Your other half used your birthday code on a microwave?! Did they know you wanted to buy a phone? Sounds like a bad relationship. Also you don't NEED to upgrade your mobile. You want to. With someone else's birthday code. You must be joking. Is it even possible to use another person's birthday code?
It's not a stupid reply, and to be fair I wouldn't have mind if you asked in a less entitled way without your ridiculous story attached. My life is not great or amazing let me comfirm that 100% with you now. Anything but.