Vodacom Upgrading Nightmare

I phoned Vodacom on 28 January 2025 to cancel a Data Sim of 5gigs. I have another account with them which is 10speed Home Internet. The consultant convinced me not to cancel the Data Sim but instead upgrade it to a 30speed Home Internet and cancel the 10speed Home Internet as an early cancellation which had no additional payments, except the debit order that would go iff on 14 February 2025. So logically I would have one account for less as the amount would then just be R349. I would get a R1000 dressmytech voucher with the router upon delivery. The consultant assured me that the new device would be delivered the next week so that the debit order don't take double. And that the courier company would phone me in the following week as to arrange deluvery. However on 30 January 2025 the courier company just rocked up by my house without phoning me beforehand and delivered the new device. I did not open the device as I did not want to be billed and still used my 10speed that would be cancelled in February and the new Home Internet would only be billed from 01 March 2025. On 15 February 2025 I was double billed although the consultant assured me that won't happen. I phone Vodacom and it took a week before they gave me feedback and told me that I would only pay the difference thus month. Upon setting up the device we smelled burning wires and smoke coming out of the device. I phoned Vodacom immediately and they arranged uplifting of the faulty device. It took a week for it to be captured on the system. Now I have spokecalled numerous times. Sat for more that an hour on every call centre just to get a new device. The reversal was done and captured but everytjme I phone the rewards department they tell me I cannot upgrade due to this reversal. I am beyond such and tired of getting this type of service from Vodacom as I have been a most exemplary customer. I have this number: *** for years. I never missed a payment for years. How can they treat a client like this. I phoned this morning again. Sat on the phone for over 30 minutes only for them to tell me they can't do the upgrade. I have been without Home Internet for days. My daughter can't access her university learning material and my son can't finish his research fir a school project. And despite all this **** I have had to endure since upgrading this contract they still debit my account. I am paying but there is no service nor device nor usage. I am currently waiting for a manager to call me from Vodacom. I will wait in vain for this company really disappointed me.