Standard of service has really dropped in recent months

Hi So I've been a client of innovation for many years, recently I've been having an issue with them. I called in a few weeks ago, call kept on dropping when they were transferring my call to the relevant department, I called for the final time and asked them to take my details and get the relevant sales department for a new policy to call me, will no call to this day. Few months ago, my 1 vehicle warranty came up for renewal and they literally doubled the booster price and the lady tells me it's bcoz of inflation. I renewed the warranty and not the booster and asked them to get a supervisor to call me regarding the booster price as I want some sort of explanation as to why the price doubled, no call back. They also said a 3 months waiting period but waived it after seeing that my vehicle has been under warranty with them for 4-5 years Today I get a call from them to renew an existing policy that's expiring next month, I agreed until I was told that there's a 3 month waiting period which does not make any sense, whatsoever.. I can understand a waiting period on a new warranty but on a vehicle that's already under warranty and I'm extending does not make any sense, I asked the sales guy to put me through to the supervisor and they can't transfer the call or get a supervisor to call me, he literally told me flat out that if I don't agree to that, then they can't help me. I even told him that they did the same thing few months ago, he says noo, it can't be done

I'm really disappointed with the service I have received with innovation in the last few interactions and I would really appreciate a call and explanation as to why this is going on especially after being a client for nearly 10 years, if not more. Your'll really need to teach your new staff what it means to be in customer service.