Flawed package upgrade process

I get debited on the 21st of every month. I did an upgrade on the App on the 23rd and come the 17th of the following month, four days before my debit, my service was deactivated. I was told i owe the pro rata amount. However, the prepared debit order included the pro rata amount and the oncoming month's payment. Most intriguing, I had to pay an activation fees! I told the agent that, they must restore my services since they will be debiting me the full amounts on the 21st, if not, I will reverse my payments once they debit my account, I will then make payment of the pro rata only and they can keep my service deactivated. They agreed.