The best restaurants serving Chinese food in The Diamond Derry Western NI

My family had a night out, 13 of us went to Rainbow. The young girl who took the order done her best but there were too many extra sides and 2 main meals too many. It was the next day I realised that I had been seriously over charged for mains and sides that we didn't order. I called in to the restaurant when it was quiet and approached staff to discuss the order (in a pleasant appraoch) and was quite rudely told by a middle aged female member of staff that the extra food was left on the table and so it must be paid for. My wife ordered an extra "portion of chicken" which they charged us for "a chicken curry with no veg or curry sauce" (most expensive side I've ever paid for), they also brought out an extra chicken fried rice main meal which nobody ordered and supposedly left it on the table. I explained that we ordered 8 main adult meals and there were 10 main meals on the order. The lady was dismissive and rude and basically told me that the food order on the reciept was provided and she fully supported that the "extra portion of dry chicken" was okay to be charged as "A chicken Curry with no Veg or curry sauce" (shocking) . There was also extra portions of chips and 2 extra portions of curry to the table that we didn't order which they kindly added to my bill.. there was loads of extra food left (that we didn't order).. The ladies attitude was terrible and after getting nowhere talking I said that I will not be back and she replied smartly "OKAY - BYE".. As for the food, it was greasy as hell. the floor was slippy with grease. Lesson learned - Neither me or my family will ever step foot in the place again. As for the owners, have a word with the staff about customer service, maybe teach the older lady member of staff some customer care. Advice - stand clear.

Oh my god .. beef curry spring roll and rice .. the worst I have ever had in my 62 years in derry