I've finally got a BT engineer to get my phone line "working" after waiting 3 months since I foned them to get connected (Can't get Virgin

)
Now the point of this post ....
The engineer said that the first engineer to connect the line put it into a cabinet at the other end of the street (they can't manage to get my address right). After a bit of searching for the right cable he got the thing connected to the right box. But, now there is an echo on the line whenever I call anyone and I get a dialing tone constantly in the background.
Before I send BT yet another complaint, I'm wondering is it possible that the my line is still connected to two cabinets? Would that explain the problems with the line now?