Vodacom contracts and data, no service nor network

I cancelled my contract with minutes and took a 40GB contract with a tablet. Since I have this contract the data is not working... I have wifi at home and only when I am home I receive miss calls on WhatsApp and messages. When I am not connected to my wifi which is a separate contract, my data is not working. It use to work, now there is never signal. I am forced to buy airtime which is R15 for 7min... why do I then pay if I cannot use my 40GB. I actually only need it when I am not home and connected to my wifi, however it never works. Spent almost 2 hours on the phone with Vodacom. Reset the network on their side and I took out the sim as told by the agent. Its still the same... then on another follow up call after an hour this agent could not hear me as the line was breaking apparently... never have I had issues with network problems where I stay. My son is also with Vodacom and his signal is 100% and his network is fine... no issues. Same network as me... how is this possible. This agent also confirmed my address and gave me an address where I used to work 7 years ago!! I asked this agent I just upgraded and they delivered the new tablet to my house so why is the address not captured and what system is he using. He confirmed its the same system. So strangely the 1st call to Vodacom asked security questions and asked my address... why on earth will the agent on the 2nd call not have my new address for the past year. They even delivered the modem for wifi at my current address... no signal at all. If I switch off my wifi my data is not working so I am paying for a service which I am not receiving... My previous contract was much more then my new contract. Vodacom is not assisting and I need an explanation as to why 2 people in the same house, same network being Vodacom have different signals... my internet cannot even open and takes 10min to load but my son's internet is normal and loads immediately, this is without wifi and only using data. I also complained as I load airtime then as soon as I want to make a call, it states 'you do not have enough airtime' so the agent confirmed that I am subscribed to some 'gameland'... I have not received and email nor a sms to confirm that I am agreeing to pay R10.00 a day for something that I am not even using.. the worst of all is, I did try to cancel all subscriptions using the *135997# if there were anything as I couldnt understand why my airtime is disappearing. It stated I do not have any subscriptions.... how is this possible. Vodacom should send out confirmation once a subscription is added... they send out communication for everything but not for this.