If you've been experiencing slower than normal speeds since being migrated to the Coms service, it's most likely because your SNR is set to 12db.
Coms had changed my SNR from 9db to 12db, and my connection was slowed down.
Then they changed it back to 9db, faster (still not back to ADSL24 levels, mind) for a few days, then [censored] again.
Then they changed it down to 6db, faster (still not back to ADSL24 levels, mind) for a few days, then [censored] again.
Then they changed interleaving off, faster (still not back to ADSL24 levels, mind) for a few days, then [censored] again.
...what fun. Just put it back to the way it was with ADSL24!