Dear Sir,
I'm writing to complain about yesterday party.I and my friends were very dissatisfied with the meal and all the service in your restaurant.
First off all, the food was awful and drinks tasted like salt water.Secondly, the waiters were very rude.They didn't want come to us when we were asking them.When they finally come they were very rude for us.
I would like to receive a full refund of the money that we've paid for our meal till..(for example :2nd April)
Respectfully
XYZ