Terrible after sales service

Purchased a new contract online, the approval process went so smoothly. Then, came the confirmation process. Due to the nature of my work, sometimes I'm not allowed to have my phone on me for safety reasons. I missed the calls to confirm my contract, immediately called the call centre and all they can tell me is that the confirmation department doesn't not have a direct line. 2 days has passed and I haven't received any information or a callback to confirm my contract. Surely there should be another process in place if a customer misses that "golden" phonecall in order for them to receive their goods.