Pizza ****mers

In the 14 March I ordered pizza from debonair which amounted to R244 including delivery. I paid with a card .the delivery guy said it declined and I paid cash . Upon checking my bank statement I realized they double charge me .card never decline and he also took cash .he never provided a decline slip.As a client that always order from them I never thought I could be ****med like that . So instead of R244 I paid R488 for pizza