No Network Coverage, Coverage Map Says Otherwise

I recently moved to a new place and before my move I checked the Telkom LTE Coverage Map and I was happy the place I was moving into had coverage but after my move I was disappointed because I got 2MBS download speed all the way from 49MBS, I have moved my LTE router to different rooms but no luck. The call centre agent told me to reset my router but seems like she is not well trained cause how does a router reset fix network issues. I was happy with my Smartplan 30GB package but now am not, please assist. I'm unhappy cause the coverage map says I have coverage, I'm not even in a remote area. I'm in Blackheath just next to Northcliff and I really expected better speeds..