Messed up company

What bull**** is this? I took a router on contract, instead of a single debit of R139 monthly you debit my account 4 times a month?? What the hell? Then there's a debit order of R619.Bull ****! you are *******! I made it clear and customised my debit order in a manner that it should not exceed the amount we agreed upon!! I want money back!! Nx!