How not to lose an order during a crisis?

I wanted to buy a stand for a laptop in one store. When I contacted the manager, I immediately did not like something. He put the phone down and said to himself: “they won't bring it tomorrow”. Calling it a premonition would be too loud. But they didn't deliver me ... and the next day, too, they didn't even call me back. Only the next day, closer to the end of the working day, the manager called me and said that they could deliver this morning. Due to circumstances, I did not have the money to take it away, and somehow I changed my mind.

The moral of this story is as follows.

If you want to increase sales in the store, then at least make sure that those orders that have already been received by you are executed with the utmost responsibility. Even a simple callback with a problem message in advance increases the chance to save the order by 95%. Do the guys like that, I would buy this “tray” from them.
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I will explain the essence of the problem.

The fact is that in our hectic time, wages are often delayed, and very often they are small, and costs are large, and sometimes with debts. And the problem is not even that the competition is high - the customer immediately turns to another store. And the fact that a person is trying to immediately buy something serious, worthwhile, with the money received, has not yet become futile. And here the role is played by the day delay. But the very next day the product is not needed. The money allotted to him is gone. And the person will now wait for the next salary, which will be unknown when. And the store was left without an order, and God knows what the customer thinks about it.

Respect, warn. This is the minimum that will now have to execute to increase or save sales.