The best restaurants serving Fast food food in Llwyn-y-pia Rhondda Cynon Taf South Wales

This outlet just shamelessly stole from me. I ordered 25£ worth of food, they sent me a pack of chicken nuggets worth 7£. If some random person stole money of you like this they'd be charged for robbery, yet Mcdonalds does it and it's ok? Absolutely disgusted and if it's not sorted by tomorrow I'll be making a complaint to the police.