Over charged

<p>i had a contract with Telkom through Sell Direct. There was a time where i couldn't pay the invoice but then i made an arrangement with them to pay, and i have paid R1745.00. After i paid the amount they blocked my phone and couldn't use it anymore. Nobody phoned me to let me know about their intention until the first week of April when i received a call from their lawyers to say i owe R3700.00. They have blocked the phoned i was not using their services but i have to pay them, for what i don't know. According to the lady who phoned me from the lawyers the case was sent to them in February this year and they only contacted me the first week of April. At that time the amount was R2792. this is not fair.</p>