Service support

My internet has been down 3 days.  Day 1 spent 2.5 hours on chat/live chat.  The first live chat person asked me to be patient then after 30 minutes he disconnected with no warning.  The Matheen worked with me and said he had scheduled a service call for me for yesterday but could not give me a time block.  Waited all day, no call no show.  Today reached a person today who said I  had a service ticket which did not have an appointment set.  The first appointment she had was Saturday at 7:30 am.  Hey Xfinity your off shore phone service is making fools of you.  My service drops then reconnects, at times fast then slow.  Will not work for 2 hours then works.  So far the only thing I see consistent with Xfinity is their taking their payment.  MY REQUEST AT THIS TIME IS THAT I GET THE PROMISED SERVICE CALL TODAY, THURSDAY APRIL 23rd. If going into the Xfinity store and getting all new equipment is a viable solution please tell me that.