Poor Customer Service

I purchased a voucher valued 399 and deposited 400 into their acc. After a week of not hearing anything from them I called and spoke to Nureen Leeman who told me that the money is reflecting on their side but the system will not process my order because I deposited 400 instead of 399. She asked for proof of payment and I went to my bank to get it since payment was made via eft. I have been taken from up and down by her and a guy called Runiel Phigeland . All I wanted was the money to b loaded on my groupon acc so that I can purchase the voucher aging