Request to remove comment of phone number

Scam???????????
Social Media South Africa.
Voice message: To opt-out or opt- in

it then suggest going to the following website www.npconline.org.uk if you want to opt out otherwise leave your details.
Had two calls from this number today on my mobile did not answer; l phoned back on a hidden number to find out who called.
There’s message advising that you have just got through to Sales and Marketing Call Back Service for Social Media Marketing South Africa.