Connectivity issues

[Gillian191]

I have always used 4G data boxes for my internet. For the past day I cannot get sky to connect to my wifi saying there is a problem with my broadband but there can't be as I am using it on my phone and my computer. Odd times when I reset it on the tv, it connects but only for about 20 mins then goea off again. I have turned the 4g data box off and on and also the tv and sky box off and on