AT&T service sucks. billing me for cancellation when i am within my 30 days to switch

just got a bill from AT&T where they are billing me for cancellation of service.

i got line from at&t on 12/21/07 and switched to verizon on 1/17/08 therefore i am within my 30 days. the customer service said they dont know if i am within my 30 days, i have to call another number(1866-9014965) on monday to ask them to verify if i am within my 30 days. this is just a run around and a scam by AT&T to get money out of unsuspecting customers. why cant at&t get a better system to link all their departments.

and thats not the only issue, i switched to verizon basically of bad customer service in the span of 3 weeks with AT&T. i returned the phone i ordered due to some issues with it and when i wanted to get a replacement, i couldnt get one because their system says i still have a phone. Hello!!! I have the RMA# with me and it says they have already receieved it. Basically i had to tell the customer service person the RMA# and so she can log it. And since she has already logged it, she still couldnt get me a phone... cause... the system still says i have a phone... what a crap!!!

all the 4-5 customer service people i spoke to in that 3 weeks were all so without common sense and so hard to talk to. where do they get their people.

and in the first 2 days that i was with verizon, i had such excellent service. so why cant AT&T get better people and better systems.