BAD SERVICE

I have settled my std bank credit card immediately after easter holidays. I have phoned the call center letting them know of the payment and that i have requested a paid up letter, which they only sent to me on the 7th of May. At that same time i was told that there are funds acredited to me. Give them my banking details, as i am writing to you now i have not received the money, everytime i called they told me will look at the matter, till today. They always promise to call me, yet nothing. I have spent my time and money phoning that call center.