Poor After service

I bought a 2017 X5 at Inspectacar Brits in July 2020 and the remote for the entertainment system was the incorrect one. From September I have been bugging AK and asking for the remote but everytime he keeps coming with excuses as if it was not his problem. I went as far as to get get a quote from BMW and they ignored it and mentioned they ordered the remote, that's in September and we are now in December. How can you sell a car thats not 100% functional. I tried calling the manager Stewart, but unfortunately he does not take calls I even sent him a msg but he still ignores. How does inspectacar value clients, is it that once the car is gone its no longer their problem. I have correspondence showing that I was trying and that only excuses were coning to me. I can promise you 1 thing I will not be purchasing any vehicles from inspectacar in the future.