Prome breaking agreement

Worse treatment ever, they sent me a promo end of June to upgrade from access to family and pay R210 in July and R210 in August, just had no problem Now in August my subscription is been suspended while did make a payment on time like we agreed on the upgrade promo, now am contacting them to find out what happening they telling me it's no longer available while still have the sms that state that state R210 pm until September now they want me to pay R270 extra and am asking for what no one want to explain as they rude, self service is bad Twitter dstvcare they useless don't know what they talking about, now they refusing me to downgrade telling me must pay there R270 but am asking why must I pay because it's Dstv who is breaking the agreement of me upgrading