Keep an eye on the progress of the DLM process.
Once both are complete, post your stats and we can suggest whether or not any improvements can be made.
If this is the case, then a friendly phone call to Sky will need to be made. From there someone can configure the speed of your line manually.
No one is allowed to configure your line before the initial DLM process has been completed and it isn't a good idea to attempt it before you have resolved your wiring issues.