need new subscription needed


hi all
newbie here
i have a zgemma h1 box just run out of provider v.m.
i can only get 5 channels now bbc1/2. itv/ch4/ch5.
my provider no longer available / only doing iptv and wanting new box more cash ect....
where can i purchase another subscrition for zgemma openatv 6,1 ?
is it easy to install?