Motorola Defy :: Mass Delete Contacts From Motoblur

I had recently purchased my first Android device, a Moto Defy+. This is not a carrier locked phone.

I use my gmail contacts as the default address book and when i signed up for Moto blur account, it somehow made a backup of all my gmail contacts on motoblur. Now, i can see the same contact details twice for every address book entry. During the backup process, motoblur deleted the leading zeros from all phone numbers. Even though gmail is my default address book, the phone picks up motoblur stored info while making calls - due to which I am now unable to make long distance calls from my phone unless i manually go and edit/delete the phone numbers from the motoblur section on the address book. needless to say, this is very irritating as i have over a 1000 contacts.

How do i delete all my contacts from the motoblur section? i do not really use the motoblur account for anything and if deleting the motoblur account is a solution, i'll be happy to do that. however, i do not want to do a factory setting restore.