Is it possible my bill with eclipse can prevent me from getting another dsl provider?
Of course it will - even AFTER you've paid the bill.This is because of your "credit rating". If you've ever owed outstanding money and not paid it and they've had to go beyond the classic red bill, then you will not be able to access a number of services until you:
* pay the outstanding amount
* pay Experion a removal charge so your credit rating is restored
This is unavoidable. You will be blacklisted by whichever company decides to use experion or does credit history checks on you. A company you owe outstanding money to is entitled to share that information in order to get their money back. This usually works for them in the end.
This hasn't ever happened to me: I've always chosen to go without rather than get in debt. But I know how it works regardless...
Best you go without until you've paid it off IMHO