This app was mentioned in 6 comments, with an average of 3.67 upvotes
Sorry about your situation.
Would this work?
Found a few but not sure what you're after. The last one is quite handy for other uses though
https://play.google.com/store/apps/details?id=com.adengappa&hl=en
https://play.google.com/store/apps/details?id=comq.android.autoRedial&hl=en
https://play.google.com/store/apps/details?id=www.fastcustomer.com&hl=en
Linkme: Auto Redial,FastCustomer.
Edit: I fail at linkme.. lol
https://play.google.com/store/apps/details?id=com.adengappa
You can set delays or have it automatically go on speaker etc. I used it to call a call center that was somehow always engaged.
Use Auto Redial. You have options to set no of redial attempts and it works even when the phone is busy.
Possible with this Android app: https://play.google.com/store/apps/details?id=com.adengappa