Jean,
Any idea of just where these were graves when moved?
My dad, who was an electrician, used to carry out maintenance at Aston Church in his spare time in the 1960's and 1970's. Sometime in (I think) the 1970's a new church house was built close to the west end of the church, and the digging of its foundations necessitated the removal of some graves. Holte Road is to the west of the church, and I wonder if the moving of your family graves had anything to do with the new church house.
Interestingly enough, as the graves were uncovered, most of them were 19th century, but as the excavators got lower, they uncovered layers of graves going all the way back to pre-Conquest times. I understand that the Archaeology Department of Birmingham University was called in to carry out an investigation.
The law states that if anyone's grave is moved, the remains shall be re-buried in consecrated ground with all due respect and Christian ceremony, and that the site of the new grave, and the name of its occupant, be marked and recorded. Whether this applies to ancient, unmarked, graves, I don't know.
If you didn't receive a reply to your letter, Jean, then I'd make a personal visit to the church house - sorry, I don't know the name of the current incumbent, but I'm sure that your visit will be well-received by him/her.
Big Gee