It's called 'caller id spoofing'. The people calling you can make any phone number show up on your caller id. They're making a number show up that charges you money if you call it and press a certain key.
At the same time they've disguised the messages on their pay by phone system as surveys. Those messages normally tell you what you're buying and how much it costs.
Check your bill for unwanted charges if you called this number back.
Same as everyone else, got the call last night. I called back and pressed 2, like a dumb-dumb. Now this morning I got a text from347-688-0864 saying that I have been randomly selected for a $1000 Best Buy gift card and it give an internet address. I'm sure last nights call and this mornings text are related.