This number has been calling me at least 3 times a day. When I answer no one says anything. I call back and it gives a busy signal.

called 6x in a 3 hour period no message..i picked up once they hung up

they called me twice. 1st time no message.  2nd time saying something about an order and confirming my address.  hung up after I angrily asked "what are you talking about?" It was an accent similar to Indian/pakistani accents.  When I tried calling back the number- a recording says the number is invalid.

Suspicious caller calling , leaving no message.