COMCAST THEY WON’T STOP CONTACT MY BUSINESS CLOSING SOON!!!!

I have a business coffee cafe shop 

I called comcast on today for stop contacts with comcast

I request for cancel for my lease with landlord will TERMINATE on

December 31, 2018 with my landlord 

I must be to close business on December 31, 2018

I have agreement with them 3 year 

and I can t stop contacts with them and I have a letter notice confirm for

lease terminate with my landlord  

and I have a proof my document with my landlord for show them too.!!!

they sad kind like it s not my business

They said if I want to stop ealry before agreement date expire

they will  be to charge me for all pay off before agreement expire it s price is $1300 blah blah 

if you want to cancel or stop early . It s stupid 

I told them for WTF because my business it s close on 12/31/2018

I can stop contacts with other company but why  I can t stop with comcast?

They so rude ans control me for you must be to transfer only

can t stop my service this is ilegel law this is not right way 

because I have a paper lease terminate with my landlord on Dec 31 2018

it s a nightmare and rude terible service