CITGO review: Money order I purchase myself

I purchase a money order from that store and mins later I was told that I didnt needed to purchase it so I turned right back around and walk back in the store and told the lady I didnt needed it so she told me they do not cash out money order which was mins later after I purchased.. No one else at any other place wont cash it back out for me because I was told I have to cash it out from wher I brought it at.. Every other store tells me that I have to cash it out where I brought but the lady is being a bit towards me y 56 dollas that I need to pay my bill with is just air timing right alongside me who do I talk with b4 pursuing it farther