Very bad service

I am waiting for a parcel and change my address. After a few calls to both wit airtime using for ram to phone they delivered my parcal in Nigel after I phoned them several times. Now I must waiting for my parcel and phone them again to change my address. How many times must I phone them while they repeated every time with old address. How can people work like that. I am really not happy with that. Who is going to pay for all my phone calls?? Me????