Completely unfair

I was forced as a former employee of fgro red to get a discovery bank card during their trial phase of introducing discovery bank into the company , despite my reluctance. After receiving the card I DID NOT USE IT AT ALL , however today 05/12/23 11:02 to my dismay as i wanted to cancel the card i was made aware that the account is at -R317.38 . Call recording with the discovery bank ***7. I was afraid to cancel the card as i feared i might loose my job. After resigning in December due to personal issues i was still unable to cancel the card as it slipped my mind. It is completely unfair that i have to settle this amount when i never wanted the card to begin with. Fix it.