Pep Boys Recommended service that was NOT needed, left truck without OIL... Long Beach, California

Josh - Assistant Manager, I took my Bronco in for an oil change and to have the Brake pads replaced. I received a call from the assistant manager saying they would not be able to work on my brake pads as "the rear brake is about to fall off" was severely rusted. That I would need to replace the brakes, bolts, nuts, springs etc.  For a total cost of $1200.

When I went to pickup my vehicle, the receipt showed 10W30 oil, I always used 5W30 as I live in the mountains with cold temps. I asked from 5W30 and was upset that the wrong oil was used.  There was NO sticker inside the vehicle to show the oil change had taken place.  
Josh assured me he would take care of it.  This is where the story gets worse.....

When I went to pickup my vehicle we had been double charged for the oil change, no big deal I saw it on the receipt and Josh was able to refund the price.  He told me "you sure know a lot about motor oil" I have a witness that was with me, I thought nothing of this and took my car home.
The next day I went to a Brake specialist and was told my rear brakes were fine, no rust, no damage.  He replaces everything did all the work for $300.

I figured I should check my oil just in case, turns out it was EMPTY.  Completely drained..... The day I left to drive from California to Wyoming.  

Josh told us her personally grabbed the 5w30 oil, now I believe he purposely and maliciously had the mechanic not put any oil in my truck.  How on earth were 2 oil changes done. One with 10w30 and one with 5w30 and less then 24 hours later the truck has no oil.....

I called to complain and have not heard back.  My truck could have exploded on the road not to mention the upselling of parts and labor that was not needed.  

So how is Pep Boys going to resolve this issue?