Harassment by Woolworths

Since October 2018 I am receiving reminders to pay a Woolworths credit card, at least once per week. The last message read: WOOLWORTHS: MRS SL HOLSTER you have NOT HONOURED your ARRANGEMENT to pay R200 on 20/01/2019 00:00:00. To STOP SUMMONS & LEGAL COST PAY TODAY. TEL ********** 219. I have phoned the above no and explained to them several times that I am MR E MARAIS and that ********** 373 has been my cellular no for approx 30 years, but to no avail. I have begged, shouted, threatened and asked them to PLEASE TAKE MY NUMBER OFF THEIR DIALING LIST. They promise profusely to do so , but the messages never stop. Please, if anybody can help me to make them stop these threatening messages, I would be more than thankful! Please note that I have NO account with Woolworths.