Ask to buy

If you have followed all the steps and instructions in Related Article: If Ask to Buy isn't working and if you still need help, get more help and assistant from Apple directly, see Contact Apple for support and service -> Contact Apple for support and service – Apple Support (UK) 

This incredibly infuriating issue is easy to fix! Go to "Settings -> General -> About -> Name" and simply rename your phone. So strange that this has been going on for years, Apple has never done anything about it, and the fix is completely bizarre. I hope people come across this fix and save themselves hours of headaches!