I wouldn't bother with the Ombudsman if I were you. I had a problem with my home phone (delivered through a provider other than BT, but still across the Openreach network)
Fault was reported on the 10th of February.
By May, I had gone through all the processes and contacted the Ombudsman. They did absoluley diddly squat.
I got the phone working again on the 4th of October. How? By speaking to an Openreach technician in the street one day and making a private arrangement.
The Ombudsman are still writing letters to me to try and defend their deplorable service.
Save your time - Flag down an Openreach van!