Delete all Leads/Accounts/Contacts??

Delete all Leads/Accounts/Contacts??

I've uploaded about 30,000 contacts and leads to Zoho CRM. I just realized I upload lists that I haven't de-duplicated yet. How can I completely remove all the data I've uploaded?


If I used mass delete I can only delete 100 contacts per page, this would take forever.... is there a faster way? Or is there way to de-dupe accounts/leads in the CRM itself?