Many years ago, in rural NE Scotland, I raised a complaint with OR via a web form, regarding a long D side cable, large sections of which were lying on the grass verge. It was frequently suffering physical damage resulting in loss of service to many customers. Shortly after the report, the cable was buried. On another occasion I reported a raised footway cover causing a trip hazard - again efficiently dealt with.
In more recent times, the only option seemed to be a phone call, so I'm glad to see that a web form is again available.