Amazon Seller Cancelled Orders Twice After No Shipment

I placed two separate orders from the same seller via Amazon. My order numbers are 407-1598205-0956303 and 407-4838394-3660367. Although 5 days passed after the orders, the seller did not ship the products and cancelled both sales without making any shipment. Since the same issue occurred twice with the same seller, I called Amazon customer service right after placing these two orders and explained the situation. I was clearly informed that there was no problem with stock or my orders and that the products would be delivered to me without any issue. Despite this assurance, I called customer service a total of 4 more times at different times, explained the same issue again and was told every time that “there is no problem.” However, when I checked my account yesterday, I saw that both of my orders had been cancelled. I am trying to understand what this seller gains from such a process. This situation feels almost like a form of fraud, and by providing a marketplace to this seller, Amazon is effectively enabling this behavior. Even though the amount charged to me has been refunded, I believe the seller benefited from holding this payment for 5 days while I, as the customer, was left aggrieved and without the product. A customer recognizes Amazon as the sole counterpart; however, I am told that there are processes running in the background with the seller and my grievance is not resolved on this basis. A person can make a mistake once, but when the same thing happens a second time with the same seller, I believe there is bad faith involved. Under the applicable consumer protection legislation, I expect both the seller and the platform to comply with their sales and delivery obligations they have committed to, and if this is not possible, to offer a solution that will not put the consumer at a disadvantage. In this context, I request that the product I purchased be supplied from any reliable seller on Amazon and delivered to me, and that any possible price difference be recourse to the related seller. I believe that if such a method is applied, similar grievances will not be repeated for any customer.