Insulted when trying to swith from Business to Residential

Hello, so I tried to change my business account yesterday only to be given the run around and be insulted by one of your reps over the phone.

I called and explained that my account had reached the end of the contract period and I wanted to switch my service to a residential plan.   I was transferred to an individual who said I needed to give 60 notice or i would be billed for that time.  I told him i did not want to leave Comcast but to transfer to a residential plan, he said that if i had a residential plan the plan would be removed after 10 days. I said well that’s what I want to do, he said well do you have a residential plan, I said no because I need to cancel the business account first.  He then got very rude and said ( remember this was after 10 to 15 min speaking in the phone) I can't understand a word you are saying, I asked what he meant, he said you sound like you are talking through a pillow and I can’t understand what you are saying you sound funny.  I said I am English so my accent if different than yours, his reply i know what a English accent is and you sound funny. 

The next thing i find myself transferred to another rep whose name was Jason who said he was from residential, So i was insulted and transferred to another dept. without even asking me.   Jason tried to help but was unable to do so because my account was locked by business, I was told.  he said he would transfer me to someone who could help me and then he would take over and finish off my request, he took my phone number just in case we lost connection and said he would call back in 10 min if he lost me.  The next thing I know I am transferred to dead air.  I remained waiting for over a min waiting and nothing.  so i waited for Jason to call back which never happened.

So now what, I tried to call back only to find the dept. closed.  I am very frustrated and sorry i did not get the send reps name.  I am considering in launching a formal complaint unless this is resolved quickly.