Sunday Times, please take revoke your award for best car hire for Avis

I had perfectly fine service up until I paid. It was a case of "now that we have your money, we have the business in the bag". Avis car rentals holds a security deposit which is perfectly understandable. A few days after we returned the car, full tank and all, I sent an email only requesting the amount held as security - nothing else, it was not a query rocket science related. Every email ive received back - that is after i send 2 follow up emails asking for a reply - bounces around the question giving me answer about the status of my transaction from this and that bank or merchant. Again I would reply saying that is not my query, all I am asking for is the amount - I honestly cannot phrase it any easier. Now after nearly a month I get a response - with no apology or any grace for that matter - saying they cannot disclose the amount. The first response atleast relating to my query! Also after 7 days of no follow up! I find it very upsetting and disappointing that it took less than 1 minute to take my money but its taken almost 1 month to get feedback on such a SIMPLE query - which is still not answered! It is very off-putting to receive this kind of post-service and no doubt will hinder me considering your services in the future and advise others on the putrid customer services received.