Premature Cancellation

I requested a Premature Cancellation Quotation on May,3 2021. Paid it in full on May, 10 2021. Emailed the POP, completed Premature Cancellation Document with my ID to the email address provided. Got no further instructions, no follow up. Now I am getting emails that I URGENTLY need to pay almost double of the premature cancellation quotation, but the matter should be settled as I paid the bill in May...