Reimbur*****t of account

Vodacom cancelled my contract after I wrote here on Hello Peter but I’m not satisfied at all. I believe they should reimburse my account for that R700 as they are the ones who did not cancel my contract as I requested.That R700 bill is for the airtime that they kept loading in that phone which I did not even use because I knew I cancelled my contract. My contract ended in April 2023 but only cancelled in July. Right now their collection department continues on harassing me every single day for payment.