Terrible customer service

I app**** for a contract earlier this week and it was approved. But shortly after I got an SMS saying the device is currently out of stock. I also got an SMS saying that I would get a call within 72 hours to conclude the order and nothing as of yet. I tried to contact customer care which is useless. Everything has to go through a virtual assistant and when you select chat to live agent, there is some sort of error and can't do it. I just want to find out a few things regarding the contract, seeing as the debit order mandate already came through. This is my first time applying for a contract so i just wanna make sure that everything is in order.