We added several contact list(from our other services provider and from our Zoho CRM system), we found that we need to clean the list first and then upload. 

I know I can delete the lists but that will occupy  our contact quota(we have more than 130 contact quota as we are Zoho one user). However, I realized if I delete the list then the quota will be used. 

For some lists, we have never sent a single campaign before. My question is that can you please delete those lists we have never sent campaign before and do not occupy the quota? we will clean the list and upload again

Thanks