Unprofessional and ineffective communication

My debit order bounced from my bank, so I called motor plan direct to provide me with other options on how I can make a payment or inform them that they can make a second debit, during the phone calls I have been taken back and forth and was even promised by one of their agent that they will contact me. I sent an email also with no luck. Right now I'm worried on how they will treat me when I have to take my vehicle for service if they are so unprofessional now.