I have had a nightmare dealing with their customer service. Hour and half holds, dropped calls, inconsistent messaging, losing my information (personal address

I have had a nightmare dealing with their customer service. Hour and half holds, dropped calls, inconsistent messaging, losing my information (personal address e.g. despite it being on an incident tracking website), lack of communication, difficulty with partner airlines getting ahold of them. I took a Lufthansa+Air Canada trip because it was $300ish cheaper than the alternatives and I regret it. I also know many people personally who have had terrible experiences this past summer. My suggestion would be to rebook if possible, but it might not be too bad since the summer is over. Either way I hope things go smoothly.