sani did illega card purchase of R142 000 in my FNB account

They did an ******* card purchase of R142 000 in my old cancelled FNB card. ive hired a vehicle once with them in 2024 and they inspected the vehicle and there was no single dent, they never contacted me about anything and now they left my account in a very huge negative balance. Whwn i phoned them SANI they said they dont know anything about this yet it them .