UNHELPFUL AND DON'T WANT TO ASSIST WITH CAR SALE

I feel I'm being messed around and ignored by the Renault Tokai branch. I took my Stepway there on 16 Oct for a quote to see how much they would offer me for my vehicle because I am interested in the CAPTUR, I went out of my way to take my car. The lady I dealt with sends me a mail the Monday 19 Oct to say she forwarded all my details to another sales person. I rep**** and said that I do not mind who assists me. The Thurs 22 Oct I mail the sales manager to complain about the poor customer service as no1 got back to me, and no reply. Is it that Renault has too much sales so they not interested in assisting me... Tell me something is it up to the sales staff to decide whether or not I'm taking the vehicle and just not bother to get back to me in case I'm not going to take the deal. Even had a bad experience with the services department which ignored my request when my car was brought in for a service, that matter was also not resolved. I like Renault vehicles and can only deal with the Tokai branch as it is central so what can I do now with the way I'm being treated as a customer? Should I change from Renault to V W or Toyota etc.