Last six month my bus a/c been overcharged $70.00 per month !

I found out last six months my Comcast business account been over charged of $70.00 to $90 per month , Yesterday made a call to get help to resolve it ,. expalind to Comcast customner service agent ,ask them to refund the overcharged amount , customer service person mocked me told me ,boldly ! comcast don't give  'FREE MONEY"  ,still I am in shock ! I did not ask  any hand out from you !!! every individual  have integrity and dignity , I owned a small business , how dare you  mock me " Free money" !! it is ulterly an  unprofessional way  ! very disappointed , bulled by , fact is every month( past six months ) for no reason my business account been overcharged ,my bill always under $140.00 , highest $150.00 . I being charegd $220.00 " per month THAT'S NOT RIGHT , I am getting same service , I been told by agent , I can not make any changes in my account untill  make a full paymnet ,I been over charged around $420.00 , robbing the customer and bullying them to pay it , that is not right , I made a change four month back to cut the cost changed TV channel , even after that my  bill starts  to $70.00 more than usual, I called again to talk to  the superviser , I ve been put in called for 28 minutes , then they to told me to get back me same day ! till 24 hours ! no one reache  me out yet , looking forward to resolve this issue to cahge my business account .

Thank you Lyes \.