MTN, must I take my businesses to another Service Provider?

I wanted to upgrade my contract to a Samsung Galaxy s25, they advertise it, but they don't have any stock and are not going to get stock. Email as received before they called me: We're on the lookout for your device *** Y'ello Catharina Kruger Your device is out of stock right now, but more are coming soon. You'll hear back within 48 hours with an update.

The Head Office in Bloemfontein's number does not even ring, pathetic.