Lack of trust by supplier who cancelled deal after my bank approved the payment

I tried to buy a camera bag from them online. My bank required all the security questions to be answered and approved of the sale. I then got an email from Parks Cameras headed "Action Required - Your Park Cameras payment failed..." on querying this I got the reply "Thanks for your email. If your bank was able to authorize that payment It is possible it failed our vetting process. Our payment provider is more cautious than many due to the nature of our business and amount of fraudulent activity that persists. It is not uncommon for us to need to request alternate options form customers." I have never heard of such nonsense before as my bank had cleared the payment. They even had the audacity to invite me to do more business with the even after I told them that "If they could not trust me why should I trust them" Needless to say I got the same deal from another supplier without all the nonsense.