I had a very bad experience with Design Quote as well. 90% of the time their "verified" leads are not actually serious people, or people who already have a provider and just need to get a few throw-away quotes.
Sometimes the leads never respond to you, despite multiple attempts to follow up via phone and email. Design Quote support is non existing, they just ignore your requests for a refund for the bogus lead.
Strongly advise against using this company.