Disappointment is putting it nice

I’m so disappointed … I bought a mac book 13 inch from vodacom signing a contract to pay 700 rand a month for 36 months. First only my mom could qualify and they deducted the R700.00 from her salary every month. After 6 month I put the account on my name when I qualified and thats when the trouble start the first time they deducted R900.00 from my bank now its R1311.00 when I phoned vodacom about this they said its a game I’m playing I said I play no games and Im not even using my vodacom sim as I have wifi and I dont need one for my laptop. After a long struggle they said they will refund me next month and deduct it from my payment next month… again this month they deducted R1111.00. VODACOM I WILL NEVER BUY ANYTHING FROM YOU COMPANY AGAIN!