I opened all the doors in the fixture list and got all the rewards.
On the last day, I was supposed to unlock the 'Endurance Training' achievement but it failed and the progress shows 18/21.
Consequence: My achievement got stolen from me and I didn't get the 70 football I was supposed to receive.
I opened a ticket to support and they are not willing to help.
Now I'm left hoping someone unlocks the situation so I get the missing footballs on time and maybe one day they are able to unlock the stolen achievement.