Bad attitude from front staff

I called the medical centre this morning to make an appointment for myself & my 2 kids, and the lady that answered the phone was extremely rude. She cut me short at every turn. I have been a customer there since 2008, but she proceeded to tell me that my information was not on file. This isn't the first time I have experienced bad service at this centre. I was once made to wait for more than 30 minutes when my doctor was available to see me, all because I didn't make an appointment prior to coming in. Today was just the straw that broke the camel's back. To receive bad service from individuals that are supposed to help you at a time of need is just unacceptable. I hope this will be addressed with the staff. We deserve good service for our buck.