Vodacom not righting their error

On Sunday 31 May 2020 I went to the Vodacom Online site and asked for an upgrade for the phone number I have had with Vodacom for more years than I care to remember. On 3 June I received a confirmation call but the call dropped halfway through the conversation and I did not receive any follow-up call. On 4 June I received delivery of the device I asked for. On putting in the new sim card, however, I discovered a totally new cell number! So I realised that instead of an upgrade I had received a new contract - NOT what I asked for! On 5 June I called the help line and spoke to Latifa, who said she would arrange for collection of the incorrect device and delivery of the new device. On 9 June I spoke to Gabrielle regarding the cancellation of the new contract, which I did not ask for. On 10 June my upgrade device was delivered. No collection of the incorrect device has been made. I have made numerous calls to different "help" numbers, and spoken to umpteen people and still the incorrect device has not been collected and the new contract still appears on my account!! I can not afford, and will not pay for, an additional contract. But I am not getting help from anyone - just getting the run-around. I contacted Vodacom via FaceBook and gave the person all relevant details. Not sure if that will help. Today I spoke to Thembile on the after sales number. She is requesting phone records from my call on 9 June and will come back to me. I am at my wits end. I have never had such bad service before this - and I have dealt with many service industries in the past. I am almost 70 and need my phone but I cannot afford 2 contracts! I am unable to go out, and I can't seem to get the help I need. If double the amount goes off my account at the end of this month it will mean something else will not get paid! Desperate!!