INTEREST TOO HIGH AND SERVICE BAD

I had an account with Woolworths Credit Card and was handed over to MBd .I have paid far more than I owe,my problem is when I enquire my balance last year it was R10044.34 in March and in September it was R9684.65 when I enquire in January 2015 it was R16000.00 and when I ask them for the detailed statement they promised to e-mail me but till today I haven't received it. one 2 weeks back I got a call from head office and say my balance is R8000. but last week I got a call again to say my balance is R16000.00. I want to know what going on with this Attorneys I even inform them when I was not working but they still charge me a lot of interest. And why all of the suddenly my balance has increased by so much. they don't e mail me the detailed statement I am told I have to wait two days but nothing happened . MBD DON'T HELP YOU TO RECOVER INSTEAD THEY MAKE PROFIT FROM YOU.