Refund denied

i am very unhappy with the service , i changed from my previous ISP to Telkom this is the biggest regret and mistake of my life . ADSL was installed last month on the 13th of April the promotion deal was R199 first six months thereafter R329 on a 24 month contract with no extra fees and charges , to my surprise this moth on the 21st of May telkom deducted R1,127.95. My debit order date is on the 20th of each month but i had to call telkom to deduct the funds out of my account .......i called the whole of Wednesday to be assisted i was send from one department to another from 8:00 in the morning until 11:00. i was only debited the next day on the 21st since then ive been calling everyday for my refund I logged a formal complaint received no reply i spoke to several consultants requesting them to put me through to a team leader they kept on saying the mangers work from home ,i was assured yesterday a request was logged for my refund today i received an sms no credit due to me .