Builders Warehouse card is pointless for pensioners!

In the T&C's 'Benefits of being a Builders Card holder' 8.1.1 says "If you are over the age of 60\(sixty\) years old then you will receive a 10%\(ten percent\) pensioners discount on Wednesdays which is only applicable to Builders Card holders;. Being 68 years old, signed up for the Builders Card. Presented it today (Wednesday) at Builders Warehouse Bedworthpark. Only bought regular priced items - nothing on special/sale. Card was scanned and - NO DISCOUNT! Very disappointed, can see no benefit to having a Builders Card. Would NOT recommend!