Can someone make sense of this internet connection issue?

[PlayingWithFire]

What does this mean? What do I do?

This is to inform you that your ADSL2+ with Home Phone service has been installed at the MDF (Main Distribution Frame) cabinet in your apartment complex. Dial tone and service continuity has been tested/proven at your MDF on Vertical A Pair 187 and it was tagged with your unit's address.

The technician who conducted the service installation at your MDF reported that your pair of wiring/connection cables on your side of the MDF from your home unit is either missing or not available or could be occupied/in use by an existing service (either active or inactive).

If you are getting a dial tone and getting operator voice messages when trying to dial out, it means that your home unit still uses the existing cabling of your previous telephone service in your location whether active or inactive. Since your cables are associated to a service whether active or inactive, you will need to get a private/licensed technician at your expense (as stated on TPG Terms & Service Condition) to disconnect your cable's current association to that service from your side of the MDF and connect it to the above given vertical pair for you to be able to use the TPG service.

If your home unit previously have a working telephone line service that is currently inactive then you will need to get a private technician to disconnect your home unit's line connection from it's associated Vertical pair at the MDF and to be connected to the above giv
In testing the line, there seems to be a dial tone and operator messages. This means there is no line fault from our apartment to the MDF... does anyone have ideas on what is causing the problem? Thanks!

[Ajenthan]

Your internet is interfering with somebody's else's line in summary. The guy or guys that came to your house to fix up the internet connection may have to come back to install some device that separates your connection from interfering from some else's line (Old ISP that you were probably with). Thats their own side. On your side of the bargain, you may still have some other ISP connection either active or deactived temp, so you may have to deal with that first to permanently deactive from your old ISP before going on with your new ISP.