In light of/In view of/Considering/Seeing the fact that your expectations were not met, I'll bend the rules and give you a full refund.
A: Hello, I'd like to return this woolen sweater.
B: Do you have the receipt?
A:Yes, it's in a box.
B: Would you like to try on a larger size?
A: No, thanks. I just want my money back.
B: We don't provide refunds, although I'll be happy to exchange your purchase.
A: If that's the case, can I try on a different style, please?
B: Items can only be exchanged for those of the same style.
A: I don't want the same style. Not only were the arms too tight, but the body was too baggy. If I get a larger size, the arms might be alright, but the body will be even looser.
B: In light of the fact that your expectations were not met, I'll bend the rules and give you a full refund.