Cancelled contract early, but still getting charged?

I have successfully canceled my contract early because I moved away from Germany. My contract ended 1st Feb and I received the email saying ...

“We will cancel your contract with the number +49 (0) 176 XXXX XXXX in advance to February 1, 2020. 
For the early cancellation of your contract we will charge you as agreed 53.17 EUR.”

I paid the 53.17 via another bank account cause my German one is now closed. But today I get another invoice for 10.16. What is this for? As I thought the fee of 53.17 was all I needed to pay ???

Edit by MXP_Alex: This is a public community. Please never post any personal information like phone numbers or customer numbers!