Bills coming after contract termination

Hello Team O2,

I have used o2 dsl service till march 2018.
After termination, I paid a bill of 90,28 euro and got confirmation that the final bill was recieved.
However, I received 3 bills after the payment of my final bill.
I paid the first bill of 2,5 euro after getting an information that 2,5 euro is the late payment fee of final bill.
I paid 2,5 euro also and got confirmation from team o2 over the facebook page that final bill is completely paid and everything is settled.


However, I got another bill of 4 euro for june for which I didnt get any explanation even after reaching out to o2 team.
Furthermore, I received a bill of 8 euro for the month of July.

I would like to know:

1) what are the bills of june and july related to?
2)How could o2 send me bills every month after contract termination and full payment of final bill with late payment fee?
3)I am unable to login to my account to see what is happening? can you provide a relevant username and password for my account to see what is happening?

I request a reply soon since I am asked to pay bills by the o2 team without an explanation for what I am paying. Moreover, the bills are incrementing every month without letting me know what it is for.


Customer number:6041921317

Thanks and regards,
Devika Sasi