Annoying phone call

Someone from Absa has tries calling me over 50 times. The number been used is ********** .They do not leave a voicemail nor send an SMS. This is rather annoying over 50 missed calls. I received an e-mail from them about 2 weeks ago.And they said my credit card is overdue.I res****ded to them and said I am on debt review.I was asked to send documents from my debt counsellor and I did.But still the calls won't stop. Pls can you ask this person to stop.I am at work and dont have time to entertain these calls I hate Absa with guts hence I left that bank and went to Capitec.