Poor Systems and reluctant checkout staff

We had problems this week trying to redeem our Clickscard points. On the first day the system was down, on the second day the card was scanned to see how many points are available - when we returned with the good to pay and redeem the points the system would not accept the card again because it was scanned previously. The staff in the shop was reluctant to assist to resolve the issue. I had to go back a third time in order to be able to redeem my points. On a positive note, the call centre staff is sufficient, friendly and helpful....can we move them to the tills in the shops please