Guess we all have our good and bad

So from getting good service last month to getting terrible this month. I ordered my sons gifts online on the 21st June. received a sms that weekend telling me the 1 item was out of stock. then all of a sudden the order gets cancelled with no call or notification to me. i am furious,and the call centre agent tell me oh mam your account has been credited. Thats not the point! My fight is why have something available online and then tell a customer days later there's no stock! DOES YOUR ONLINE SHOPPING SYSTEM SUCK? and not correspond with your stock on hand! I am very upset with Edgars at this point,What do i tell my son :(