Just that exactly!
Like a mug, I have been paying £10 into this scheme for several years and am left wondering why? I bought 3 pairs of trousers online, to try on with the plan of keeping the best fit, used my £15 reward voucher for the purchase. Yesterday I returned 2 pairs and in my refund they took £5 off each pair, basically keeping £10 of my money for themselves. I mean really! According to customer services this is what they do!
Fed up with the whole thing, I used to love M&S but this club rewards thing is a joke. So am I being unreasonable, I can pay £10 a month and they can treat me like this or should I tell them where to put their rewards scheme?