http://proteavouchers.com/ Took my money 3 times and did not give my vouchers

On the 17th January 2019 (My son's birthday), I went onto http://proteavouchers.com/ to buy him and his fiance a voucher. After putting my American express credit card details in, the website was unresponsive. Thinking it was Firefox, I tried the same thing in Google Chrome, The website also just 'looped'. I then tried internet explorer and it also hung. Convinced it was my American express card, I tried my FNB card, this went through and I got a confirmation. Imagine my surprise the next day, when I got 3 seperate sms's from Nedbank(American express) to see that 3 separate amounts have been taken off. I have phoned and complained to the call centre, and sent 2 separate emails. I have just got my American express credit card statements, and the 3 amounts still reflect. It is now 2 weeks later, and no response from protea hotels. If Protea Hotels had at least given me the voucher numbers, I would not be so angry, but I have paid for something 3 times and have nothing to show for it. What kind of internal controls does Protea Hotels have?