my card was clonned and you can't come back to me

on 02/05/2019 i sent the documents to rcs desputes after there was a puchase of R1000.00 shoprite on the 30/04/2019 that i do not know,until today i did not receive any feedback always when i call they say they still investigating.while they told me the investigation take 21 days . why they do not tell me its me who did the purchase and show the cameras and the my signature. and they stoped my card i cannot use my card since i reported this matter