How can one answer unless u show complete maxilla or mandible because only teeth give u 100% confirmation may some zoologist could do it

you may want to join inaturalist.org 

Check on who to contact with Dr. Robert S. Sikes - [email protected] (http://www.mammalogy.org/)

and contact Prof. S.W Nicolson, Head, Department of Zoology and Entomology, University of Pretoria, Pretoria 0002, South Africa, +27 12 420 3233, [email protected]

see also:   https://www.researchgate.net/profile/Reuben_Garshong

 You can contact Dr. Grant Singleton

https://www.researchgate.net/profile/Grant_Singleton

Onlу I can tell they have nothing in common with spiny mouse (genus Acomys)...

So it is really better to contact the related group specialists.

I think so and agree with the above viewpoints.