Vodacom changes billing date as pleases

Vodacom decides on a month to month basis when they want to debit my account when i clearly stated on my contact with them that i only get paid on the 25th the 20th of this month they debited my account and took the last of my money for the rest of the month.<br> <br> And the best of all is they billed me R900 more then they were suppose to and tells me that they can not give me a detailed statement to show why they took off the amount they did.<br> <br> To top everything, they sold me a tablet (The new telefunken range) that can not be fixed in South Africa! in order for me to fix this tablet I need to send it overseas that will cost more then it would to buy a brand new tablet.<br> <br> The service i receive from Vodacom is shocking!!