I called back number (07) 3193 9016 reached voice mail but did not say for what company.

Caller: No idea

Answered the phone and they didn't speak no problem blocked :)

They’ve called numerous times this week. Called back to get answer machine with vague message and no company name. Answered most recent call and they hung up. Block.

They didn't leave a message

Not sure who got voicemail, but the call came shortly after another call which I constantly get calls from Discount holidays they sell holiday vouchers

unknown