Failure to payout an authorized claim

Had an accident on the 14 March, made a claim on the 15 because on the 14th it was a Sunday since Miway is not operating on Sunday. My claim was then authorized and was told they will fix it, my car was towed to their dealership. I was then sent an email on the 26th April and was told my car was uneconomical to fix, and was written off.when I called to get clarity I was given 2 options, 1.pay out for the value of the car 2.buy the car back and get 25000 to fix my car,although I was not happy I had to take second option because I was told my car is fixable but it's uneconomical for them to fix, till today I've not received my car and the pay out.. I'm using the car for business purposes, I've tried several times to speak to Miway but still no positive response. It's so sad that I as a client have never skipped payment but when I need help as promised I'm being failed