I have E3372 HiLink with 22.328.62.00.1185 and it works well. I wouldn't recommend flashing to old firmware as the first attempt of solving a problem.
This tells us close to nothing. When you can't access Internet, can you still access HiLink web interface? What does it say about connection state? Maybe it's problem with HiLink setup / ISP problem? Did you try that SIM card in another device (e.g. smatphone)?