The claim goes through Axa, not multitrip.com.
I had a bad experience but it was mostly my own fault. I decided to post-claim instead of seeking approval during holiday. The multitrip website gave me the Axa UK address (I didn't realize you had to change it to Ireland) so I sent my claim to London, heard nothing back, rang them and was advised to write to their Irish office, heard nothing back, wrote to their English office, heard nothing back. I gave up in the end.