Kate Beckinsale is embroiled in a messy battle with a trauma “healer” who claims she stiffed him on a nearly $3,000 bill — but the

Kate Beckinsale is embroiled in a messy battle with a trauma “healer” who claims she stiffed him on a nearly $3,000 bill — but the actress says she’s not paying because he allegedly sexually assaulted her.

In August, Nick Abramovic of the Bionic Method was contacted by the “Serendipity” star’s assistant to discuss scheduling sessions. Three were ultimately booked during a two-week period for $2,700 total.

The sessions consist of an “intense” and “emotional” massage similar to those done during Reiki therapy, in which the healer uses psychosomatic practices to heal parts of the body that are in pain.

We’re told that clients remain “completely clothed” during the sessions, with Abramovic — who denies Beckinsale’s claims against him — insisting, “No one is getting naked, no one is getting undressed, there’s no oils.”

“I will touch people in non-invasive points; it’s all external,” he further explains. “I’m not rubbing my hands up and down. It is very much a stretch therapy, sound therapy and breath-work. It’s very above board.”

When Beckinsale walked into the Bionic Method for the first time on Aug. 2, Abramovic claims he offered to leave a camera on during their session — as people often like to watch the recording back to reflect on their experience.

However, the “Underworld” star, dressed in yoga pants and a gym shirt, allegedly opted out of that request, citing privacy reasons. Only she and the healer remained in the room together.

“He did not ever offer to record the session. That statement is not truthful,” Beckinsale’s lawyer, Marty Singer, asserts to Page Six.

Abramovic claims that after the session he believed Beckinsale was pleased with his services, as she gushed over his healing methods and returned a second time.

A text message Page Six reviewed shows the star’s assistant purportedly writing via text prior to Aug. 4 that Beckinsale “really enjoyed the session.”

Abramovic claims the actress also told him herself, “‘You’re like Harry Potter. I would really like to promote you on my Instagram. I think we could do a party at my house instead of me having to come here and you could meet all my friends.’”

The healer, who claims he has not received payment from the “Jolt” star for the sessions, says he didn’t realize she was “expecting free s–t” in return for her recommendations.

On Aug. 7, Beckinsale and Abramovic had their second session. An alleged text sent by the assistant on Aug. 8 and reviewed by Page Six shows the assistant then booking the third and final appointment.

However, sources close to Beckinsale tell a very different story, as they claim the movie star did not go to her final session because Abramovic allegedly committed sexual assault and battery during the second.

“’Somatic trauma therapist’ Nick Abramovic is well aware as to why his bill has not been paid,” a spokesperson for the actress exclusively tells Page Six.

“He knows this because he received a letter from Kate Beckinsale’s lawyer Marty Singer. Kate is not able to discuss the matter because it is being investigated by the LAPD.”

The Los Angeles Police Department has confirmed to Page Six that they are in the early stages of an investigation pertaining to an incident between Beckinsale and Abramovic. No charges have been filed.

“We’re interested in hearing from all parties and welcome anyone who feels that they’ve been the victim of any sexual assault to let us know so that we can look into it,” a public information officer says.

Abramovic’s attorney, George Shohet, tells Page Six, “We’re looking into a defamation case as this appears to be a retaliatory act after Mr. Abramovic demanded payment from Ms. Beckinsale.”