Edgars OTA airtime not received

I bought airtime using the OTA service but i never received the vouchers. first it was MTN R15, once i didn't get it i bought another one, I didn't get that one either. this was on the 13th of June 2018. Haven't received the vouchers until this moment. on my statement it shows that the vouchers have been charged for, how?? i want my money back or the vouchers i purchased.