Paid but no delvery

I ordered a 1 plan router and sim and Paid R559 but it was said my payment does not reflect and was sent an email and asked to send screen shot and bank statement for proof of payment, however when I reply to the email it says the email address cannot be found. I called multiple times and have to explain the same thing over and over again to each different person that answers my call and they keep saying the same thing that they will escalate my matter to the billings department and call back. I Am never called back for feedback I have paid on the 26th of May and today is the 6th of June but still the issue has not been resolved. I am so disappointed and feel cheated as R559 is alot of money for me to receive such poor service. I want my money back or issue to be resolved and treat me fairly and deliver on tour service.