Who called from 2135047020

Caller ID claimed to be "GAMMA INDUST."
Picked up and said nothing. They first said hello and hung up immediately.

no message left

Called twice & did not leave a message

I have been receiving numerous calls from this number/company.  Leave no messages but keep calling back.  This is beyond annoying.

Caller ID showed as 'Gamma Industries', sounded legit so I picked up. He's telling me something is wrong with my computer. Asked him to stop calling. Not sure they will stop though. He did have a foreign accent...so could be calling from anywhere...and spoofing the number.