Sounds like you have ES .......
("Elvis Syndrome"- twitching of upper lip towards eye)
But seriously,
How much Tramadol is your daily dose - total?
How often and at what dosage is your Neurontin/Gabapentin?
Dosage adjustment would be the first trial to see about pain control.
The spasms could be controlled with Baclofen or something similar.
But you definitely have to take something, to control two (or three) different issues. Pain, PN Symptoms (different from pain), & spasms.