Service fees suddenly added to my Account

I am perplexed at Edgars suddenly charging me an additional service fee to my recent statement - which which did not form part of the conditions when I opened my Account and signed up for Club (R44) many months ago. On the new statement it states that from now on due to high management of account costs, this fee will be added MONTHLY to all debit balanced Accounts. Already if in negative balance customers are charged interest, and how in the world can it be declared that according to NCR it is in order for Edgars to charge this to the customer (me) WITHOUT my consent!? I did not sign up for this, I signed and agreed to a monthly R44.00 club fee only which I'd been paying up until now. Nowhere in \club signup\" did I agree to being charged unknowingly at an unknown point in time - that I'd be billed additionally for no reason whatsoever. It seems Edgars does just what they like, and now I understand why they're in so much difficulty. If this is the case, I'd like to cancel my membership as I see it as ******** ****************. I have credited my account to avoid such fees, but that in itself is ridiculous - as Edgars earns interest on those such accounts. Again ****************."