Huge bill received!

<p>I recently got debited R1,520.39 for my internet stick which is suppose to be R125. When I went to the shop to resolve I was advised there was nothing to do and I should just pay. This huge jump in my bill all occured during one night between 12pm and 6am when I am always sleeping! I also regurlarly check my balance and never ran out of data since the signal is very weak I am never able to use up my data but apparently I am able to receive a bill of R1,520.39 for doing nothing. I would appreciate my money back.</p>