Sudden price increase

I am really impressed that Mr Shopper responded to me regarding my previous incident, but once again I was left to decide whether to continue shopping with you. Having spent around R7000 on you in less than a year, I'd like to get some feedback on the Fitbit Charge HR - Large. Yesterday I was browsing your site and found the item at a great price (+ -R2400), so I was willing to sleep before buying it. Today I go online and it is R3300 - EXACT ARTICLE, Exact Reviews !? How do you justify the price increase so suddenly? And I'm pretty sure this wasn't a mistake on my part as I split my eBucks (R700) and decided that a cash payment of R1700 wouldn't affect my budget.

I understand price changes, but this seems a bit more like a mistake, whether it's yesterday's or today's list price.