Thanks for reaching out to us here in the Community.
It sounds like you've had the promotional discount, and the discount rolled off on your agreed to date, and now you're getting the regular pricing for the product. You'd need to contact our customer service team as they have the tools available to review your account details to see if your eligible for a discount. I've included the steps below to contact support.
Bottomline, your discounted period is expired and you have to pay the regular price now. If you wish to get the lower price, you will need another effort. Utilize the 3rd party tool to migrate your data between QBO accounts.