Amazon - Cancellation of AMAZON order

I had ordered an ASUS Radeon RX*** O*G Graphic card from Amazon. I am a Amazon Prime customer and it is believed that Prime customers has got a preference over the normal customers.
Though this product was also available on another online store, I ordered from Amazon as I am a regular customer on Amazon Prime and continuously shop a lot of products from Amazon.
This product was readily available in stock,(the supplier also delivery was also available to my location) when I ordered and I paid full amount of Rs *****/- online instantly to get it on time.
I was eagerly waiting for this product and had scheduled my work and design orders accordingly on this basis. Now I am shocked and at a great loss to receive your message that my order is cancelled. When I wanted to re-order the same product online, I notice that the price of the same product has gone up to Rs.**,***/; (link below) _so exorbitantly high that I cannot purchase it now at the price you have on Amazon now. Even on the other website, it is out of stock and I lost the very chance of upgrading my computer to take execute the design orders.

https://www.amazon.in/gp/offer-listing/B***CMPRZZ/ref=dp_olp_NEW_SINGULAR_mbc?ie=UTF*&condition=NEW_SINGULAR

I am very much disappointed and this is very unethical and cheating a customer on the part of Amazon to cancel my order and I strongly suspect that it is because the price of this product has gone up in the online market.
You have refunded my money (SMS copy attached) but that is not the case here. You have broken the trust of a loyal customer here and I believe you would do likewise with other customers in future as well.
I kindly request you to please supply this product to me at the original price (Rs.*****/-)that I had ordered for.