Complaint about vodacom

I am very upset with the service that I got from vodacom I got poor customer service and they ****med me daylight as they are charging me up normal amounts, the consultant from vodacom called me he said as I am spending too much on data vodacom they can upgrade me from 2G to 6G then I asked the consultant 3 times that am I going to pay the same premium that am paying which is R597 the consultant said yes I am going to pay the same amount to my surprise they charged me R777 and they send me the sms that says am going to pay this amount until 2025 meanwhile this consultant didn't even bother to tell me that this 6G it will be for 2 years, if he did mention to me this 6G data it's a contract for another two years I wasn't going to agree with him. after I received a message I called vodacom to cancel this 6G contract they told me that they are going to penalize me R2000 how can I be penalized for something that I didn't agree of or signed for. On the 30th of September they were billing me R3243. 58 and 5 days later which is today the 05th October they are charging me R4042.09 I honestly don't know why am I being charged for and with the bill that keeps on going up for what I don't know. Vodacom they are abusing my consumer right as their client for 3 years I paid them in full without giving them problem now they are thanking me like this by treating me unfairly and abusing my rights and by taking advantage of me since we'll they saw am a good payer