I also just have been called starting today. I found this number listed on several other "who calls" sites like this one. Seems to be the general consensus they are credit card scammers. I will not be answering but the sheer number of calls is getting ridiculous.
Just got a call from these guys. Actually they left a message - but very garbled - guess they want you to call back on a premium number ? Anyway whatever, it a phishing scam - stay wise people