Need advice about PTCL disconection

Hello everyone,
I was using PTCL for 4 months and paid the bill as well but after that, I moved from that house but the connection was active for 3 months and they added the bill but they never send the bill to the house just email me and I didn’t check and they came to the house and remove the cable,
and now the bill is 10000 and their recovery team came to the house to recover the bill and warn them about the legal notice.
I can pay the bill but I am not sure after paying the bill they will not send any recovery team and send the other bill.
And I am not in the same city as well so I can visit the office for any further information.
Please advise me about this matter.
Thanks.