BB Bold :: "Twitter Services Are Unavailable" Or "Location Connection Time Out After ~ 120000"

Bold 9700 - OS6 build 557 - EDGE network - BIS i am able to browse, but my twitter, facebook and other applications refuse to connect. Twitter constantly gives me either of these 2 error message " Twitter services are unavailable" or "Location connection time out after ~ 120000". Facebook says " not able to reach facebook servers at this time ". My emails, gtalk & yahoo work just right. Browsing is slow, but it works. i've been facing this problem for over 4 weeks, spoke with BB support team, ISP and even RIM Canada. Have done everything possible:

- Downgraded from OS6 to OS5 after wiping device via BBSAK
- deleted Twitter app and re-installed
- deleted service books
- chose connection only as 2G
- deleted IPP entry
- updated APN entry
- checked firewall
- replaced SIM card
- wiped off my entry from ISP servers and refreshed profile
- deactivated & activated BIS services

Now this issue is specifically where i work, so my guess is its the problem with the ISP tower. At home, i get these errors as well, but i get connected about 60% of the time. While travelling inter-city two weeks back, in middle of this problem, i got 100% connectivity with no drop outs and no such error messages. My ISP - Vodafone says they've done everything and nothing else is left to be done, they're poitning fingers at my device now. My device worked fine since suddenly this problem started.