Billing NOT correct

I just keep on having issues with Vodacom . I extended my contract with you about two months ago. <br> My new contract took over from 1 April 2015. This is a R129.00 per month contract. I paid my upgrade fee of R150 in cash at the store. So why did Vodacom deduct R256.16 of my account??????<br> I want my money refunded to me at once. <br> <br> I had endless issues when I took out this contract. You did not give me my data . I had to fight and send tons of emails . Now my first bill is wrong!!!<br> <br> My new contract is R129.00 per month NOT R256.16!!!!!!<br> <br>