LTC3780 DC-DC 5-32V converter: suddenly fault and hot
It's unlikely that just mixing up the pots blew up your supply.  Mixing up the connections might have done so but is more likely to have done so straight away rather than working for a while.

Looking on my local Amazon site one listing for this device (under a different part number) has 7 reviews. 3 owners reported their devices failed completely and 2 more reported failure to fully meet the claimed specification. So your device may have just failed because of marginal design, rather than anything you did. 

If you want to try repairing it yourself you can try tracing the circuitry back from the pcb. It is likely to be based on the circuit in the datasheet (which you seem to have found) with the addition of some pots to adjust the voltage and current limits.

Alternatively you could buy a replacement module offering favourable reviews from a site in your country. It won't be as cheap but it will be more likely to work. You could run the module on load for a few days to a week to confirm it works before making any changes to it.