Email Subscription expired not sending

Hi Support,

We have successfully received the subscription expiration notice emails, but the Subscription expired email is not sent.
We have wait 3 days after we received the email with the message that the subscription will be expired after one day.

How can we fix this issue?

Hope you can help us.

Hello,

HikaSerial just have a "subscription expiration notice" email.
The other email was part of HikaShop for the old "paypal recurring" plugin.

Regards,