Harrassing me to pay an account which i never had

Good day hello Peter, <br> <br> I am livid, on a weekly basis I receive an sms from MBDCS requesting and threatening me to pay a jet account which I never had. Everytime I receive these sms' then i call them and repeat myself over and over. I have spoken to 3 of their agents and told them I dont have a jet account and never had one yet they keep telling me that on their systems it shows I have no active account with them and that they have noted it on their system, however, they dont know why I'm receiving these sms'. They advised me that I wont receive these sms' yet again this morning I have received an sms, with an attached ref no:*** contact no: ***. <br> I am beyond myself as I know what type of impact these false allegations has on one's credit profile.<br> <br> Could you please assist .<br> <br> Kind regards, <br> <br> Miss Yaa-Hindh Felix