No service/satisfaction from Momentum Insure

I submitted a claim a week ago for a Lacto valve which is still under warranty, I spoke to call centre staff and they could not resolve the matter. I requested call backs from Momentum, to no avail. I sent emails to Momentum and are being ignored. A plumber was approved to do the job, but Kwikot decided they will send their own choice of plumber (this plumber has done work at my property before and I just had drama with them) Momentum is taking my money to provide a service yet I am making all the calls etc. to try and resolve the matter, while Momentum wipe their **** on me