It seems that ABTN is not the only recipient of unwanted calls. We have had some suggestions. This is the best of them.
”As a music manager (bands, record labels, touring etc) there are always plenty of 'cold callers'” whoever they ask for... just say ' please hold ” and I'll go find them' Leaving these companies on hold for ages drives up their phone charges and if we all did that ” ouch that could really hurt”....