Welcome to our community forums and thank yo for your first posts.
Sorry to hear you have been having slow speeds on wireless devices. I can understand this is not ideal and want to best help.
I have been able to access your account using forum details to further look into this. After running some checks it looks as if there may be an issue with your downstream power levels and an engineer may need to be sent out to resolve this. For this reason I am sending you a private message. Please look out for the purple envelope on the top right hand corner and provide a response when you can.