hello Ivan8801
Welcome to the community.
You might want to call 0800 707 707 and have them look into your connection. Depending on the type of connection you have, @Daniele_Sunrise might be able to look into it.
We’re a user based community, so it’s kinda hard to guess what could be wrong. It could be anything from a loose plug, a broken cable or your modem might have some issues.