Lost Credit but not used

So on Tuesday I had attempted to Order some fathers Day goodies - I had a Credit of R150 on my Profile which I had decided to use. However when i was a the very last Step of it All (PAyment) something went wrong with the site so when i finally got back on to the site and attempted to purchase the hamper again i noticed that my R150 Credit was no longer there. I had contacted the Call Centre and spoke to an agent whom was pretty useless - She asked for relevant details I gave it to her and she assured me that the credit has been loaded. I had asked her if there was an issue with their website she confirmed that there was as "the system was slow on her side as well" Logged on and what do you know . The Credit HAS NOT BEEN LOADED!!! I will not waste my time or Airtime calling your agents as i know how this will go - it will just be a back and forth game. Lets stick to the principles NETFLORIST. I EARNED THAT CREDIT AND WHEN I WANTED TO USE IT YOUR WEBSITE HAD A MOMENT NOW I HAVE NOT USED IT BUT ITS GONE.