Promises mean nothing to some

Early August 2023 brought me my new (used) long awaited VW Caddy. After being assured by the salesman that an after market installation of electric windows was no problem I am left with a very bad taste in mouth. 4 months down the line & painful arthritic elbows from winding windows and still no light at the end of the tunnel!!!!! I wish I'd never taken delivery until promises were kept.