Hmmmm my dear same experience I had some weeks ago. Gas we bought last at 1150 suddenly increased to 1600 a kilo
Plus our gas station we usually fill gas were even out of stock for days.

Some others sold at 1700 and 1800
Terrible isn't it? Of course

My advice: Since you've the camp gas (6kg) cylinder, why not ensure you've some kilos of gas in there so when you eventually run out of gas in the 12.5kg, you won't be stranded and eat later as in the above case.