Tasteless experience

I was in there by your KC store on Sunday with my family. Always great food and service however this time around i was left with a bad taste in my mouth. My wife ordered a beef burger the double beef with spice beef, cheese and guacamole. This burger was so dry. It looked a soya burger. The patty was crumbly and tasteless. We asked the waiter to get a manager but he was busy at the time which is understandable. We then left our details on the receipt waiting for a call but still nothing. My wife only ate a piece as she was hungry having to wait nearly 40 minutes. The chicken burger urg no taste at all. Any way I just wanted to express my disappointment that nobody called me from the store yet.