CANCEL MY CONTRACT!!!!

Vodacom is cheating us as customers. I app**** for a contract and they said I do not qualify for the P40 I wanted however they can give me another phone. They offered me a P30 lit which is older model to the phone I wanted and the payment is MORE than the phone I wanted. I agreed because I was told I can change it after 3 months when they see that I pay well. When the phone arrived they didn't make me sign no agreement, no contract. I called and was told it would be emailed. I am still waiting... Month one came when it's expected of me to make my R400 payment, they sent me a statement saying I owe R1548! That is my month usage. I called, and agents would keep transferring to other people and they will pretend to not hear me until they drop. One agent tried to assist and she said it's the calls I make. I requested she sends me a print out of all the monthly calls I made, that was not done. Instead she told me about the monthly cost I need to pay in order to see caller ID's of the people calling me. At that point I was furious because that was not communicated and the additional amount they requested cannot be justified. I decided to make the R1548 payment and called to request they do not load airtime, they said that will be done after 3 months. It is over three months, I am not receiving any data, not making calls and they sent me a bill of R2000. This is ridiculous. I cannot call Vodacom because they blocked my number because they say they received a lot of calls from my number. How ********** is that! I am honestly not happy. Please cancel my contact. I could definitely buy a new phone elsewhere with these ridiculously unjustified monthly payments. You guys are cheating people honestly..