false marketing

I've been in contact with them since 2018 asking why cover of the policy not increase as was marketed to me in 2017 when I took policy, all I'm getting is that it's due to inflation. Asking that it affects only them no response as non of their call centre, managers nor team leader are able to explain this inflation that does not affect clients. I WOULD LIKE TO FIND OUT WHY THEY ADVISE ME THAT POLICY WILL INCREASE EVERY YEAR PRMIUMM & COVER BUT NONE OF THAT HAPPEN SINCE I TOOK THE POLICY WITH THEM.