Intake Manifold Gasket Replaced Yesterday, No Oil Today. What happened? on 1999 Chevrolet Suburban 1500

The Suburban had a slow coolant leak and the shop said that is was my intake manifold gasket. $800.00 later I picked it up and drove home. The next day I was running an errand and after about 10 miles it sounded like it through a rod. Pulled out the dip stick and it was smoking a lot. walked to a store to buy more oil but it stall sounded so bad I had to call a tow truck. It appears all my oil was gone. What went wrong? Did the shop make an error when installing the gasket?

Asked by for the 1999 Chevrolet Suburban 1500
Need a little more info.
1- Did the oil leak out of it after the repair, see a puddle of oil where it was parked?
2- Did the intake leak coolant into the oil before the repair, milky color oil & over full?
The oil was almost empty after the repair and there was no puddle of oil. Since I brought it in to the shop I can not address if the coolant leaked into the oil.