Bad service

I bought something online on Wednesday 29 May and paid for express shipping . I was supposed to receive my order on Friday 31 May and actually got it on the Monday 3 June. When I tried the item on it was too small and I went to the store where I collected it so that they could check where I can find a bigger size seeing that the online sizes were sold out as well. None of the stores in the surrounding areas had the correct size. I phoned customer services today to complain only to get a "I apologize for the service". I really wanted the item and if I had received it on Friday I would've been able to exchange it over the weekend. I am very disappointed in the MRP group.