Credit insurance claim still not settled after months

I have been sending documentation for my credit insurance claim since May/April already and every time i ask about the outcome "its being processed" is the answer, all the while being called by RCS and explaining they have my documentation and being told sorry different department i need to pay the full amount. Today i was emailed a breach of contract letter 2 to 3 months after still waiting for RCS to process my claim. Every time they call i explain the delay is from there side and "oh we will look into it" is the go to phrase, there is no way to get a straight answer from them or even a direct line to find the "real" status of my claim.

It is very unprofessional of RCS to not make sure all steps are taken before claiming I'm in breach of contract as every consultant who said they are "making a not" or "we will look into it" was clearly lying.