Thank you for your post and a warm welcome to the community.
I'm sorry to hear that you've been experiencing various issues with your broadband connection.
I've had a look at things from this end and have noticed that there are a few signal level issues impacting your connection. This will require an engineers visit to resolve. I've have booked you in with the earliest available appointment we have. Please find your appointment time slot via your online account.
If you have any further questions or concerns please let me know.