Subscription Email Spam

[Pooligans]

Hello, how i can turn off emails sent to customers, when their paid subscription is about to expire. Some users gets about 50 emails in 1-2 days.

Email body is like this:

Dear xxx,

Your access to the paid subscription "xxx" is about to expire.

If you have selected a recurring subscription you will be automatically billed for the renewal, else to renew this subscription you must visit http://xxx/payments.php

If you do not extend your subscription, access will be removed.

Its really annoying and i cannot find myself an option to disable it, i even tried to search it in the source code but i couldn't find it either.