SIM SWOP UNHELPFULL STAFF

I lost my phone and wanted to do a sim swap. I called the call centre because I could not recall the numbers that I called, the last time I loaded airtime and the amount, they refused to help me. I called different people asking to speak to the Customer Service manager they refused to put me through to whoever is responsible for customer service. I went to Greenstone branch with my ID document and proof of residence they asked me the same question which I cannot answer. I dont memorise all the numers I call as phone a lot of people and their number are in the lost phone. How do I remember all of that? I even offered to produce any other proof such as SARS documents, bank documents where my number is listed but they still refused and refused to let me speak to the customer service manager. I wanted to ask the customer service manager that is he/she prepared to lose a customer who has been with them for more that 10yrs and they can use other methods to prove that this is my number? I can produce many other legal documents with my number on it.<br> <br> Their attitude was that, I can take my business elsewhere and this is what I will do. I have been using this number for more than 25yr