JM Bullion failing to ship product after receiving payment and failing to return my money in a timely manner Dallas, TX Internet

I made a purchase from JM Bullion and agreed to send them a check, which I did the next day, and I waited and waited and after ten days they called to say that there had not received a check and I explained that I had sent one.  We agreed to cancel the order, but they did an electronic check for another order, which I received my product, no problem.  A few days later, JM Bullion mysteriously found my missing check, which they did cash.  I called and requested my money back, as they had no right to it, and they said they would - but it took over two weeks.

I placed another larger order with them.  After cashing my check on June 5th, I received notice that my product would ship on June 12th (they claim that have to wait 4-5 days after cashing a check to make sure it does not bounce, which is understandable).  On June 15th I called JM Bullion as I had not heard that it had shipped as promised.  I was informed that it would now ship on the June 20th.  Eventually I did receive my product, however, buyers should be aware that JM Bullion wants their money immediately, but is in NO hurry to send you refunds or product.