Been there, done that.
You need to try this, before you go to PTA, since they will
also wish to know if you have really and honestly exhausted
all avenues with your exchange before coming to them.
01. Collect Data.
Keep a dated log of all your complaint #s on 1218. Make
screenshots of your modem stats (noise margin SNR,
attenuation and down/up stream) and speeds (done on
speedtest,ptcl.net) when your internet is really in the dumps.
02. Contact Exchange:
Armed with this data in hard-copy along with an application
made out to whoever is in-charge in your exchange, go talk
to the techs in the DSL Broadband section of your exchange.
Ask them if switching over to ONU fiber-optic line would help
your cause. If they tell you "yes", then proceed thusly.
03. In-Writing Application:
Now submit one copy of your application (detailing succinctly
all your suffering in chronological fashion, combined with the
details of your complaints and finally, the recommendation of
DSL section of switching to fiber-optic) to the One Stop Shop
of PTCL in your exchange. Ask them to stamp+sign+date
another copy of that application for you to keep, as "Received".
So What will happen ?. You will get switched to fiber-optic ONU
without having to pay anything to PTCL (because DSL section
has recommended it for you). Normally, PTCL charges you Rs.
750 for it. Furthermore, and more importantly, now you will have
deposited an undeniable, accurate and detailed history of your
PTCL broadband connection to your exchange, a copy of which
you retain yourself for future use, as and when you deem proper
Sheikh 'Hun Maujay Kus Lau' Chilli