Speedometer not working problem

I have been in dealer for same thing 3 times within a month
1st time they say speed sensor is out replaced it
Week later same thing go back to dealer rhey check wires they found bent prong
4 days later go back this time check light is on they say I had a code of speed sensor tampered with and bad sensor they cleared codes replaced sensor again
Now 3days later same problem speedometer still not working right I am steady going to dealer for same thing no check light right now but what are they missing I been in 3 different dealer I'm still not fixed I'm tired of not being able to use my cruise then I loose a day of work they say the dealer is best but I can't tell it got to be something simple new sensor and wires are fine going to sensor what's left

 

I called told them it's still not working just now they say i probably need to replace wiring harness but I'm going to go and buy the speedometer I have a pete where do I but it

 

They didn't they just said I had a prong bent they fixed it but now they're saying it's in my wiring harness or my yoke something bout 900 and a magnet but my speedometer was messing up b4 I put my clutch in December