[vampiress88]

When genuine big name brands call existing customers to either upgrade them or add new products then they usually, if you agree add it to a bill.
The only thing I have ever paid for over a “cold call” was for an order that I had placed that had failed to process a payment. They would still give you the option of just calling in directly to make the payment if it was genuine as people who do outbound are very aware of others who scam and how much that can make the customer feel uneasy.