Service plan complaint

I’ve got a problem with Auto Pedigree Strand I bought a car from them this year in April. Their service is very poor when I bought a car they told me it has a service plan 3 weeks later I received a call from liquid capital informing me that my car no longer has the service plan. When I called the sales man he told me that I have a service plan he will book a service for me because at that time my car had to go to service, up until today the matter has not yet being solved I’m disappointed your help will be highly appreciated.