Poor service/ customer service at Osman Spice Works

I recently visited Osman Spice Works on Sirdar Road Clairwood and was quite frustrated when I had to pay 2 1/2 per cent more on my debit card. When I enquired with the cashier she told me the information came from the management level. I tried calling and emailing with no response. I also left several messages for the CEO Naz, but still no communication. Sadly, such a big business Osman Spice Works has no customer care. Customers should be aware when shopping at this place with their bank card.