Nedbank card division

Disgusted in Ned bank card division. I made a transaction in March 2019 in Mauritius but walked out the shop without the goods worth R28000 . I called the bank to stop the transaction, this was done however the money still came off my account, I completed the dispute form and received a refund 2 weeks later, with a note to say it may be deducted again. The shop sent a picture to say NO REFUNDS OR EXCHANGES PLEASE CHECK TILL SLIP. As I mentioned I did not leave the shop with any goods so I could not have anything to exchange or return. Well today the 10th of July my card was debited with R28000 again. I had been in contact with the bank last week to tell them not to re debit my card, the consultant " Margaret" has to date never rep**** to my calls or emails. Here I thought Ned bank is customer driven and here to support a loyal customer of of 40 years. This has left a bitter taste in my mouth and Nedbank will now be loosing my Business account and the account of my family members .