Poor Customer Experiences

I called Xfinity to inquire why my bill increased by almost $30. One would think that us a very simple inquiry.  I called at 2:20 and after receiving a call back , 2 agents placing me on hold and it is 3:50 and I am still listening to hold music. I canceled cable months ago and I just have internet and each month the bill increases. Actually this month's bill is more than when I had cable. I  am not a diva and I am extremely patient as I reach customer service, I am a corporate trainer. Calling Comcast gives me anxiety. NO EXAGGERATION! This is the experience EVERY time that I call. They can overcharge, add things to the account and fail to adhere to any cancelation requests because they know that you will never get someone on the phone and eventually give up as I have done in the past. It is now 4:00 and someone just answered.  This rep is is very kind and as much as I hate to say it. She is American....I am sorry perhaps this is a conversation that need to be had. Cost effective for you but at a Cost for the customers. I am disappointed.  I have been a customer since 2013.I guess it is time for me to consider moving my business. This company does not appreciate my business. Comcast you are a disappointment