I called back number (02) 8020 3513 reached voice mail of a company but could not understand what because the voice on the voice mail sounds far when it was recorded.

This number has been ringing me as well. It must be a call center that deals with different firms....it wasn't OXFAM charity when I rang them back, it was the company called "hello fresh"

I called back and it was hello fresh

Been getting calls from this number once a day. I don't answer the phone & haven't called it back hoping hey will get the hint!! Getting calls while I am at work on my private mobile number is annoying. I don't care if it's a charity. I have never dealt with Oxfam and this agreesive calling has put me off ever being involved with them now.

Been getting two calls a day from this number since Monday. Goes to VM and who ever it is doesn't leave a message. By the look of other posts here, it's Oxfam so thank you!

I've also been getting two calls a day from this number (varying times of day, too) - no message left.
Makes sense that it's Oxfam - it's that time of year where they'll try to get you to donate for tax deductions. Based on last year's experience, I'd suggest that unless you're ready to donate $50 pm or more, don't answer - they really try to make you feel bad for suggesting anything less.

I've been getting two calls a day for the past week. I just let it go to voice mail and they don't leave a message so can't be that important.

OXFAM

Oxfam Charity

another one in the long list of scammers