The likes of Watchdog (and You and Yours on Radio 4) have different priorities to the consumer. The first priority is to keep the viewer's interest by having 'good' television. Their second priority is to find enough nasty rip-off merchants to fill the time available - and hopefully fed from the audience rather than finding their own. Their third is to keep themselves in jobs and hopefully go on to something better. Then, and only then, are they interested in the consumer.
By all means get them involved in your problem but recognise where they are coming from and use them rather than the reverse.