Hi,
before I can help further, what kind of things are you able to check or do yourself?
e.g.
Are you able to put the whole car safely on jackstands?
Do you have a big pan to catch fluids?
Do you have a voltmeter, and are more or less technically inclined?
If all this is true, I can try to sort out a few possible reasons and maybe get an idea what is really wrong.
(keep in mind I live in Germany, so my answer are way out of your normal timezones
)