slow shipping & incorrect goods

As a small business cctv installer I bought a Dvr for my client from them online. first they send me the wrong Dvr. Asking them to send me a replacement. And collect the incorrect one as I have a client now angry at me. They first decide to collect the one dvr and then send the replacement afterwards creating a huge delay. my client canceled the job and now think I'm giving him the run around because of this company. Due to slow shipping and incompetency of this company I'm suffer now and gaining a bad reputation.This was the first and last time doing business with them. they are ok if you don't mind waiting for an item. I would not recommend them for a small business to supply customers.They will damage your reputation with there delays.