WORST SERVICE PROVIDERS

i took out a contract with them over a year ago of 149 and every time my airtime was finished i wouldnt call or do anything. then i stopped using the sim in november last year. i started using it this year june again. all of a sudden its an open line contract and they debited 450 off my account in july for June and i reversed it. last month they took 450 again and i just didnt reverse to see where this is going and i reversed it and now they say i owe 670 for july . what ****ery is this Mrp mobile? really now? i will always reverse the money from now on. they are not getting a penny out of me.