Sheetz review: MTO shake

I ordered a Strawberry Banana milkshake at Patton Sheetz a day or two ago and the worker must have mixed it up with another order because they gave me a different drink that tasted nothing like strawberries and bananas. I'm not sure what it was but it was clearly the wrong order. I was in a rush and didn't have time to go back in to say something to them about it, therefore I just decided to handle it later and file this complaint. I would like to resolve this in a way that makes me feel like I haven't lost out from it, whether that be a refund, free items, rewards, anything that makes this inconvenience worth it. Thank you.