VAT Insurance company not paying VAT on invoice

We have done work for a client who’s insurance company is paying the bill. the insurance company won’t pay the VAT on the invoice. How or what do I do to make sure our VAT is correct. I have to file a return at the end of this month

I believe you would need to just remove the VAT on the invoice. If you’re not collecting any VAT on that invoice there’s nothing to pass on to HMRC.

Disclaimer: I’m not an accountant, so always worth getting a second professional opinion.