Who called from 2033183493

Who are these calling all the time.

Keep getting calls from this number who are they nobody speaks when I answer it goes dead

Ive been called a number of times but they change the format of the number from
+20 3-3183493 or
00 20 3-3183493 or
020 3318 3493

I called the latter as it looked like a normal number and it was Bidup TV

I have just had 6 calls back to back from this number, each time it goes dead.
Programmed it into my call blocker - can't call any more!!!

Have that - Bot!

What a pain these people are.   Called twice within minutes and had loads of them today.

What can be done to rid these pests ?  Shame we have to moderate our language, cos I know what I would like to call them !!