I was in the same position as you. Also tried talking to connected communities, digital Scotland and to be honest I formed the option that they did not know what was going on and any problems were not there’s. I tried open reach my email, no joy, BT lots of times with lots of different anwsers from lots of different people, not there fault , I honestly believe the depts don,t talk to each other.
So out of complete frustration , I contacted my MSP who was both sympathetic and helpful, two months later contractor turned up out side my home, re dug trenches put in when the village got Broadband 8months ago, put in a six foot section of pipe work and cable to my EO line junction box, 3 weeks later two openreach engeeers from a different island turned up and spent 4 days here cabling my House to the system, not connected yet as there now seems to be a mother problem with being able to order.
So you have nothing to lose and lots to gain by asking you local MSP for help.
@Lgt88 If you are EO line and only get 4mb connection then you are presumably on a very long line back to the exchange For EO line openreach normally erect a new fibre cabinet outside the exchange which enable customers to get FTTC but with your length of line it would be unlikley you could get fibre you can see how fibre speed drops off over distance