Sitting at screen felling sorry for you yet really struggling to be sympathetic.
Your situation is identical to mine which I even posted the thread to which Flynn started last year and logged my issue from start to finish (resolved with a new gearbox).
I had the first issues, faults went, then only certain gears etc. My money is the box is damaged everything you do will make things worse. By end of November car is in full limp mode with only odd or even gears and you can't get the car over 2,800rpm or 28mph.
Thats my prediction I hope I'm wrong and I'll say no more anyway as everything previously mentioned was clearly a waste of time and effort.