Welcome to our community and thanks so much for your first post - I was sorry to hear that you've cut through the cable in your garden and have lost service to your landline. I have managed to locate your account from your forum information for you.
As such, I have booked you a technician visit to come and take a look at the line for you - there will be no charge 🙂
You can check the date and time of the visit via your online account. If the slot is not convenient, you can also reschedule via your online account too.
Please do pop back if you need anything further or assistance with your technician appointment.