Major oil leak after oil change

Have it towed back to the oil change shop and have them check it out (at their expense). I think they probably left the filter loose.

I changed the oil....I'm thinking it is the filter

Check to see if the old gasket came off with the filter. Also double check the part number as you may have the wrong filter.

Some oil change places seem to think they need to use a filter wrench to INSTALL the new filter and may have made a small hole in the filter also may have double gaskets installed won't take long either way to ruin an engine.