Did SAB increase their prices before the Lockdown to retailers

Why does Pick and Pay Liquors take advantage of prices pre lockdown. A SAB Lion Quart's RRP is R10.00 excluding deposit with is R0.90. Therefore a bottle should retail for R10.90. ( as per neck tag on bottle) this is a promo that has been running for a while and any other liquor stores retails it for that price. On 26 March I purchase 2 cases from Pick and Pick Wonderboom and to.my shock i was charged R13.92 a bottle.. upon asking the cashier I was told a price increase on the product. My Brother in Law purchase a case from Ultra Liquors on the same day and paid R10.90 a bottle. How can this be or was Pick and Pay just taking advantage of the lockdown to randomly increase prices. I suggest that SAB ask retailers to remove these tags if the price to the rerailers were increased as per Pick and Pay Staff