I can provide some general advice in such a situation.
If you believe that you are not being rude to customers and were surprised to be brought into the office about this, it's essential to remain calm and composed. Jumping to conclusions or reacting impulsively could potentially worsen the situation. Instead, consider the following steps:
Seek clarity: Ask your boss for specific examples of situations where your behavior was perceived as rude. This will help you understand their perspective better and address any misunderstandings.
Listen and reflect: Even if you don't believe you were being rude, try to listen objectively to the feedback provided. Sometimes, miscommunications or misunderstandings can occur, and it's essential to be open to constructive criticism.
Present your viewpoint: If you genuinely believe you were not being rude, calmly and respectfully explain your side of the story. Avoid getting defensive and focus on sharing your intentions and actions during the interactions with customers.
Suggest solutions: If there are areas where you can improve or if there are specific customer service guidelines to follow, express your willingness to work on those aspects and ask for guidance on how to enhance your interactions with customers.
Keep records: If the issue persists or if you feel unfairly treated, document your interactions with customers and any feedback received. Having a record can be helpful if you need to escalate the matter or discuss it further with your boss or higher authorities.
Seek support: Consider talking to your colleagues to gain their perspective on the matter. They may offer insights into how you can improve your customer interactions or provide support in resolving the issue.
Ultimately, quitting a job should be a well-considered decision and not a hasty reaction to a single incident. If you continue to face difficulties or feel mistreated despite your efforts to address the situation, it might be worth evaluating your options and considering whether the workplace is the right fit for you in the long term.