Bank of America Credit Card Complaint

Bank of America Credit card department,

APR or interest rate California

-/-/15 I used a Bank America promo check - which was guaranteed no interest for a year. AT the end of - the Statement showed that as I had paid over amt due - that my promo debt went from - to -. So far so good - then in - I overpaid again - but instead of the promo debt going down or staying even it went up to -. WHy? I called 18 times and told all kinds of reasons to be overcharged. Today a so called exec said they do not tell promo balance to members cause they do n't period. SO how is one to know a promo balance in order to make sure it is paid before APR interest collects. My contratc with them says I have 1 year but if they increase my debt each month it will NEVER be paid. 6 hours, - phone calls, - emails and NO assistance. It seems to me they want promo people to default to collect extra interest compounded backwards to make it worse. AT least tell me each month how the promo is going down or remaining the same not going up?????