011-778-7870

I want to know what its all about

What it's about is number spoofing and a call most likely coming from overseas. No area code within the US can begin with a 0 or 1 and as far as I know, 0 works only for calls outside the US. The number looks suspicious and one best avoided.

My phone shows cancelled calls to this number  in South Africa, but I never phoned it?

I would like to know who they are an where they got my contact information

I called them back from my work phone. It's TNS - Market Research bs!
I blocked them from my phone

i also received a call from this number they ask you all sorts of questions your age where in the country do you live in which province what type of phone u use do you have landline at home do u have dstv is this your number what network do u use plz plz people help i want to know whats this is all about .

Iv been getting missed calls on this number and I called with my work number... its actually TNS market research I even blocked them from my phone they call more than 3 times a day and the last call I recieved yesterday was at 7pm