Early contracts cancellation - leaving abroad

Hello!

Unfortunately I needed to open a new account on here to write this, 

I have some questions that I need answers to, I read most of the topics put here but I’m not sure about some things. 

I have three contracts that I want to end early because I’m leaving Germany and going back to Poland.

1. My Handy - I already put info that I want to pay My Handy, got the letter but after two weeks it’s still not paid even though it said they’ll debit it from my account in 2 weeks. When can I expect this to be done?
2. My Mobile and My Home - I know that I need to give the Abmeldung info and Anmeldung/information about new place. The things is - I’m going back to my parents and I won’t be taking a new job, so I won’t have any paper that I could give, is Abmeldung enough in moments like this or do I need to try with some office here in Poland? 
3. How much do I need to pay with cancellation? I know one month for My Mobile but is it the same with My Home or different? 
4. Can I send the copy of Abmeldung and cancellation forms with my router or it’s better to send them in two different packages?

Sorry for so many questions but I really want to be sure to close everything and do everything as soon as possible and good for both sides :)

Thank you in advance!