So the work was all done including the heater core? Car is now driveable?

I would start with basics first, if there is no heat, the first thing I would ask you is if the engine temp gauge is getting up into the middle range (normal operating temp) and if the coolant tank is full, because if the coolant is low you won't get good heat.

If there is no freon then the AC won't work, so can't really tell if the system is working or not without a freon charge in it, so need to get the system tested for freon leaks first, then charge the system and go from there.

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