Blocked-account on collection plan & 808 no answer

For the last three weeks I have been trying to upgrade my contract but the store cannot help me due to a technical difficulty due to my account being blocked , I have tried numerous times calling the customer services to no avail to get it sorted out. There must be somebody that can look into this to get it sorted out ASAP cause I really need a new phone. It's ridiculous now having to reapply before an upgrade too it's unheard of my debit orders goes down each month as it should - it's only a upgrade same package people.<br> Please HELP me in this regard