people have opinions and advice, negative and positive, but it seems none have had any recent experience with verastarr. I don’t know anything about them.
6 months, still not done, that’s totally unacceptable.
not to blame the victim, but to step outside, a fresh pair of eyes: you might have someone else carefully read the string of emails, looking for clues as to their motive(s) or explanations. perhaps you (or they) are missing a subtly worded .......
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If they say they will fix them, and no money issue involved, it’s either lack of parts or lack of the skills needed to make the repair. or lack of funds on their end, i.e. behind payments to their supplier.
they need to answer direct questions:
1. you have all the needed parts?
2. you have the capability in-house, current employee, to make the repair?
3. any problem you are not understanding?
best of luck in these trying times.