Very slow LTE

My Smartbroadband LTE speed has been very slow (<3Mbps) for a few days now. I checked with my mobile LTE device and it's also below 3Mbps so it's not the device. I'm paying for LTE speed but barely getting 3G speed. Please fix the problem ASAP or let me know that it's not going to be fixed so I can start looking for alternatives. The speeds were measured in Amberfield, Centurion. I've tried using Telkom's email complaints service but get no feedback,