Webuser Forums: Frequent Disconnection

I have been a very dissatisfied dial-up customer of Tiscali for three years. Ever since the start I found frequent disconnections annoying, but recently, at times, they happen every couple of minutes (Its already happened four times since I logged on to this site). Most times I am reconnected but too often I get error messages to say there is no dial tone (wrong) or the remote computer cannot be accessed. On occasions the phone rings during a reconnection and often on these occasions the screen freezes when the connection resumes and I have to switch the computer off and on again. I have complained to the ISP about this (by letter - to their London HQ - but get fobbed off by being told to ring their extortionately expensive help-line).
Am I doing Tiscali an injustice or is there something wrong with my laptop's settings? As I say it happens haphazardly (I've not been disconnected now for at least 10 minutes and I can go on for an hour at times).

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