Answered the call and it beeped, I said hello and then it hung up. Spam.

telemarketer...... just block it

I get 3 to 6 calls a day 1st time I rang it back, it said number not in service, tried again today it said number not available.

just block it. spam

Same as above. Answered, it beeped then hung up. It called twice in one day

Same thing happened to me, survey of some sort man with an Indian accent. When I asked to get my number off their system, he said "sorry not possible" then hung up on me before I could say anything else.

Received a call answered, said hello and then it hung up.

Have had 2 calls today from this number, both times answered to beep then hang up

Same Same.

answered the call, a male identified himself - couldn't understand/recognise the organisation he stated he was calling from, stated not marketing just wants 30 seconds of my time - spam