Poor customer service

Disgusted with the service they provide at McDonald's Westgate, the attitude from staff to management. Went to redeem a coupon to my surprise they don't have drinks, alternative I must put more money because they don't have drinks which I refused they then decided they will give me juice which the cashier and the manager decided they will give me small juice for a medium size meal. Wow they don't communicate with me and they just do as they please with my money as far as I'm concerned mcdonald's doesn't deserve my money they don't have respect for their customers its a take it or leave it. Burger King can do much better than this! Done and disgusted