I am losing my patience with vodacom contract

I was called Mondo consultant on behalf of vodacom and offered an uncapped internet that came with an Alcatel home router. The device arrived and when I tried connecting to the internet, the device couldn't give me internet access, I tried the Sim card that came with the device on my phone to check if I will be able to access the internet. All avenues failed and vodacom had debited my account for a device that's not giving me network, even the Sim card as well. I called vodacom after sales consultants and asked them to come pick up their device and cancel the contract, in that call I asked for vodacom to refund my money as they had charged me for services that I am not receiving, the consultant said I can despute the money from my bank and that he has logged a call for RAM to collect the device. I have since called vodacom that I am waiting for RAM to come, until this day the device hasn't been collected. Now I am getting annoying calls from vodacom collection services claiming I owe vodacom money. It's so annoying because even when I call the consultants they giving me attitude. Can you please come take your device and stop annoying me and messing up my credit profile.

On another case, I had a vodacom mobile router that I was paying R199 a month, I called to cancel that as I did not want to renew my contract because I was getting less data for that amount I was paying. The retention consultant said that she can give me a better offer since I am a loyal customer, she said that she will take my data from 20GB to 100GB day and also add a free router. She claimed that she will send me my new contract information on my email and SMS the details. I did not receive any of those, I then called vodacom and another consultant said she sees on the system that my new contract says 50GB day and 50GB night, of which is what I was not offer, I was told that I will receive 100GB a day which I thought was a great deal,the consultant said she will escalate the matter to retention department. I said to her since the deal I was offered is not the same on the system, I suggest they come pick up because I was sold lies.

Please help me sort this out, because I am now losing my patience with vodacom. I can get a better deal at R199 somewhere else.