Had a payg smart meter installed today , I have been on the online chat twice to try and sort out how to top it up ,downloaded the app as instructed but it only allows me to pay gas bill , panicking a bit now as there is only £9 credit on the meter its Friday night and despite my best efforts it has nor been resolved .No card has been supplied either .I have to use a nebuliser daily for copd and am anxious that I will have no electricity . Can anyone advise me please ?