I have had an update from Tiscali today and they have told me that they are running even MORE tests on the line!
That is ridiculous.. Its over a month and they are still playing around.
I think I now what my own re-action would be at this point :/
Theyve had more than enough time to sort it.
As Ezzer (who is a BT engineer) says "unless the problem which caused it in the first place has been resolved, then resetting the profile can easly cause the drop of sync's which you seem to be suffering from".
Sorry but they are just messing you around now and doing anything to avoid calling out an engineer
You have been very patient so far, so perhaps a "gentle prod" saying something along the lines of
"You have had over one month to sort this problem. Due to your failure to progress the fault and you not being able to provide me with satisfactory service, I hereby request that you release me from any contract and provide me with my MAC key without penalty so I can take my account to an ISP willing to escalate and resolve my line fault. "
(obviously Im not aware if youre in a contract but if you are make sure you say without penalty)
You could if you wish give them another 7 days and say that if the fault is not resolved within the next 7 days then you will expect your MAC without penalty blah blah blah