Line cut without prior warning

I NORMALLY GET MY ACCOUNT VIA EMAIL. LAST MONTH I NEVER DID SO I DID NOT KNOW HOW MUCH TO PAY. THIS MONTH THE ACCOUNT CAME AND I SEE WHAT I AM NOW IN ARREARS BY AND WHAT MY CURRENT BALANCE IS. IT ALSO SAYS DUE BY 26TH. NOTHING ELSE. SO I WAS PLANNING ON PAYING THE FULL AMOUNT ON THE 25TH. SUDDENLY I AM CUT OFF ON THE 19TH ??? PLEASE SHOW ME WHERE IT STIPULATED THIS? I IMMEDIATELY PAID THE OVERDUE AMOUNT. MY ISSUE IS THAT THE ACCOUNT SAID DUE 26TH SO WHY SUSPEND MY LINE ON THE 19TH? ALSO NOW I WILL BE CHARGED FOR RECONNECTION FEES. I HAVE BEEN A LOYAL CLIENT FOR MANY MANY YEARS. THE WAY I FEEL NOW IS I WANT TO CANCEL MY SUBSCRIPTION AND MOVE TO ANOTHER SERVICE PROVIDER. I EMAILED YOU PEOPLE ON MONDAY BUT HAVE NOT HEARD A WORD BACK. NOT IMPRESSED TO SAY THE LEAST.