Welcome to the forum and thanks for your posts.
I'm sorry for the connection issues you're having with your BT Infinity service. Thanks for connecting to the test socket as the guys on here have suggested.
As the connection is still dropping in the test socket this is a good indication that it's a network fault. You can send us over your details so that we can have a closer look.
Click on my username here >> RobbieMac << and you'll see our contact link on the left hand side underneath my profile picture.
Have you had BT investigate your connection(s) in one (or more) of their street boxes where the fibre from the exchange is connected to the copper cable to your house?
Since April, I have had significant dropouts & reduced speeds. The situation is STILL not resolved, despite the visit of 4 BT engineers, none of whom were properly briefed on the problem & what previous engineers had done. I'm certain that the problem lies in one of BT's street boxes, into which Openreach (ie BT by any other name) bods poke about just about every day. In doing so, they seriously adversely affect my connection.
BT also keep 'closing' my fault, despite the fact that although sometimes my connection remains on & at a reasonable speed for maybe a day or two, the identical problems come back again, ie more men have been poking about in the BT boxes.
The Smart Hub has been installed for several weeks now & no, it has made no difference. Hardly surprising since the problem is caused by the engineers contracted by BT (Openreach, now allegedly not part of BT, but since my contract is with BT it's still up to them to sort out their contractors) poking in the BT street boxes & in doing so, beggaring my connection.
For a few days now following another engineer, my connection has been mostly stable (I did register one dropout yesterday) & the speed acceptable, though not as fast as before. However, I'm still not holding my breath as on Monday, you can guarantee that Openreach will be poking about in BT's street boxes again.