Contract not canceled as per my request

I had a Vodacom Contract for more than 6 years and kept on renewing every year until now. I was thee best customer, I never missed even a single debit order. Now this year June I go to Vodacom Wonderpark to renew contract and get an IPhone, the lady said I must come next week , I went there on Saturday. I said fine , I called the call center, they ordered the phone and said it will be delivered in 5 to 7 working days since they have stock, following day they call and say they unfounately don't have stock for a Phone and watch, I said its fine they can give me the phone, I waited for the confirmation of delivery for more than 7 days, I started calling them twice a day to follow up, they then blocked my number so I can nolonger call and complain, decided to cancel all my contracts and I Paid the money required for closure, they skipped a month and debit because I assumed contract ended; later their debit order went through and I returned it because I have proof that I canceled all my contracts. Even have the email they said I must send with POP.