Cancels debit order & its my responsibility?

Autopage cancelled my debit order 6 month prior to expiry without my concern, account is now 3 months in arrears, line has never been soft-locked so that i can be aware that they haven't been debiting my account. I call them today to find out why they haven't been debiting me after i noticed the account arrears on my credit profile and they(Shareen from legal) tell me it was a system issue but i am still responsible to make sure that the account is paid, i must have checked my bank statement and i am in bridge on contract? REALLY!!<br> <br> If i am out of the country, how am i supposed to do this? Isn't the reason why a debit order arrangement was made in the first places? Now i have to be inconvenienced for a mistake THEY made. This is ridiculous, WORST SERVICE EVER!!!