The contact info I have for One Click Cash is below:
Preferred Cash Loans dba One Click Cash
customerservice(at)oneclickcash.com
2533 N Carson St, Ste 5024
Carson City, NV 89706
Phone: (800) 230-3266
Fax: (800) 803-9136
But their compliance department responded with the following address and email when they zero out my account.
One Click Cash
52946 Highway 12
Suite 3
Niobrara, NE 68760
compliancedepartment(at)oneclickcash.com