Has internet worked at your place before with the current equipment?
Did you try disconnecting everything from the telephone line and then connecting the modem only directly to a wall socket?
Try to connect a phone to a wall socket via an ADSL2+ filter and check if you have dial-tone.
If no dial-tone try another filter? If no other filter available, try without any filter.
If you get no dial tone with the phone test, that probably indicates you have a line problem and you need to get help from TPG.