Hello guys whats up? im in trouble!

In m town not all places have grounded power plugs...the current power defaul in the country is 127V...it goes from a range 116~128, just checked mine yesterday and im with 124V.

But man the eletrical noise is too much, i tested two guitars and man its the same on their both,i cant play, its too much hum, too much noise,since i cant ground every place that i go for gig what can i do to solve the problem with the amp? And yes im sure the problem is the power sources from this town.