"BOO" to Defy Help Centre and their promise of escalated job!

I have a Defy tumble dryer which is still under warranty. It is malfunctioning, so I contacted the Defy help centre on 9 January, and was informed that a technician would assist me within 2-3 working days. I received no assistance, so I contacted Defy again on 15 January, and was told that the 'job' had been escalated, and that someone would assist me that day. No assistance AGAIN, so I contacted Defy on the 16 January.... "it has been escalated", was the response. Still no assistance, so I contacted them twice on 17 January, and was assured that someone would call me back before 2 pm …. needless to say … no response!