they phone you answer they hang up, why can nothing be done about these sorts of calls surely telstra can block them

I called back number (03) 8518 6536 spoke to a woman who said I've reached Excellent Offers.

Caller: Energy compare

Very persistent Indian caller won’t leave you alone, when you are polite to tell them we don’t need the service, he would say you have no idea... Called from different numbers. Very very annoying.