Hi guys
I have an almost-year-old WIND SIM card. It seems like I'll go skiing to Italy next week, so I dug it out and dusted off

I have some questions about it:
1) I've put it in the phone. It logged to the Polish network, *123# says that I have 0€ of credit on it. It means that it's still active, amirite? Is there any way to check its expiration date?
2) Last year I had Mega Ore 50 active on it. I didn't deactivate it when I left Italy - I hope that when I top up my account it won't suddenly charge me for 12 month of unused Mega Ore?
3) There is an activation fee of 4€ when you want to switch an service on. However, I didn't deactivate my Mega Ore, so it should be active as soon as I top the account up, right? No need to send any SMSes and I save 4€?
4) I've lost all the papers apart from the SIM card (I have the PIN written on it) and I don't know my WIND phone number. Could the 10-digit number starting with 320 which is printed on the SIM be my phone number?