Disappointed with service from Discovery vitality

Attempted to book accommodation via the website however there were constant errors of which I have screenshots. Errors were ''vitality discount server error'' and ''Discovery vitality was able to complete login request''. I was therefore unable to book my accommodation at a great rate of just R800 per night at Infinity self catering apartments in Cape Town. I took a photo on my phone of this rate. However when I went back online to complete my booking this morning, the price had increased. You work so hard to achieve maximum discounts and now when we want to use it, because of technical issues I have lost out. This is very disappointing. I called vitality today, reference (see below) and was informed that there is nothing that can be done. This is supposedly Discovery's excellent customer service, due to their issues, customers must suffer. I would not recommend.