Disappointing service from McDonald's Harrismith

Went to Mcdonalds at brergview complex in Harrismith today, used the drive through ordered the chicken sharebag and guess what when I get home which is about 50kms from Harrismith realise that the meal is short with 1 chicken burger. Ok I've always heard people complain about this but it had never happened to me and today I guess it was my turn, very disappointed in the McDonald's staff at Harrismith was not expecting this kind of service from them. Now I cant even return the meal because I'm too far away and 1 family member will not have their burger tonight.