NEED OF A SPECIALIST

I hava TT 1993 3000GT, cant seem to get it to turn over; ive had the ECU & PCM refurbed and changed the coilpacks over but to no avail. Ideally would love to bring it to a specialist to return it to its former glory

When you say “turn over” , do you mean start and run or do you mean nothing is happening when you turn the key?
Enda