Magic Tracks Company not sending correct items ordered.

On 16 Dec. 2017 I ordered 2 sets of Magic Tracks. It was a buy one get one offer.  I should have received 4 sets.  When it cam on the 6th of Jan.  there were only 2 sets.  I contacted the service people that said they would send the other 2 sets out.  That was on the 8th of January.  The next package did not come until the 20 of January.  They had sent the wrong items again.  I had to wait till Monday morning to contact them because they are only open Monday - Friday.  On the 22 of January I call the service line once again and told them what had happened they said they were sorry and that they would get it out that day.  I asked if they could expdite it and they said no.  I asked to speak to a supervisor and they said that they did not have a supervisor.  How crazy is that? This is now the 24th of January and I have not received notice that my package has been sent?  How can companies get away with this?