Caller: Electricity Sales.

called twice, I rang back, the office doesn't open at the weekends !!

I called back number (03) 8751 8428 rang once then gets disconnected automatically.

debt collectors that claim they are closed on weekends but still call on weekends.... somewhere abroad

Caller: about gas and electricity deals

rang me twice within 1hr on a Sat. no message left. when I called back there was a message stating they were closed and only available Mon - Fri business hrs

Caller: Dodgy utility service providers

They obtain ph numbers through illegal data base sellers then try to sell dodgy services where they don't have a company name or address