No transparency in voucher use & faulty website messaging

Good day,

I received a voucher form Safarinow.com that expires on 31/10/2017. Last week, I proceeded to make a booking through this establishment to make use of the voucher. After I received a quote, I proceeded to pay the deposit amount. On the site, I was presented with a textbox to enter the voucher amount. I proceeded to enter the voucher amount, and the amount of the quote changed, deducting the voucher amount from the deposit and full balance of the quote. There was an option to enter your smart shopper account number, which I have, so I decided to also enter my account number. I proceeded to make my payment and only saw after I did the payment, that the amount changed back to the original amount, not taking into account my voucher. I sent safarinow.com an e-mail asking them why did this happen, and I did not get a response on my e-mail. I mailed the same e-mail address yesterday to follow up, and somehow the message was posted on the message board of the booking I made, confusing the person from the establishment where we booked the accommodation very confused. This was quite embarrassing on my end as well, as the message was not intended for them. So today I decided to phone Safarinow.com, as they have not come back to me yet. The lady on the phone was not very helpful or sympathetic to my situation or tried to help me in any manner. She just referred me to the voucher T&C that we received as a link in the e-mail where the voucher was sent. I did not read those T&C, but I did read the terms of use that appeared on the site for the voucher. There was no indication from what I could read that I cannot use the voucher and enter smart shopper points at the same time. Also, when I entered my smart shopper points, the website also did not give me any warning that my voucher would be not taken into account if I enter that. As a customer, I feel Safarinow.com has violated my rights to transparency as well as being heard when I try to complain or find out what went wrong. I will never use this establishment again or fall for any of their voucher tricks ever again.