Did you sign up with Surfline Ghana as part of their Surfprise promotion, enticed by the offer of a free Mi-Fi hotspot that you could use even if you decided to change providers in the future?
Unfortunately, it turns out, Surfline cripples the power of the Huawei E5372 they so freely gave you - not just by locking the device to their carrier, but by removing its ability to connect to radio bands not used by its network. Not so useful that "the device is yours forever" with such anti-customer behavior in place!
Since they won't help us, let's help ourselves:
If you buy a "stock" Huawei E5372 you'll see it play nicely on pretty much any network because the excellent hardware inside supports many 3G and 4G bands. Surfline's firmware intentionally removes these capabilities, so we'll use the magic of software to bring your Mi-Fi back to its stock configuration.