Refund for my tickets

Computicket ****ed me of my money, I bought two tickets last year in April for Silwa nemimoya event that was going to take place at Nelson Mandela Stadium in November last year but then the cancelled the show and I requested for a refund and until now I never got my refund which they claimed they did and I need to speak to my bank, I went to my bank and they advised there was no refund made by computicket