If your phone number is mistakenly left as their contact information by a company's finance, and you have nothing to do with the company, you can take the following measures to solve the problem and complain about the change:

1. Direct contact with the company: First, try to get in touch with the management or relevant departments of the company. You can explain the situation to them by phone, email or letter and ask them to correct their contact information.

2. Provide correct information: When contacting the company, provide your correct contact information to ensure that they can accurately record and update.

3. Emphasize the seriousness of the problem: explain the inconvenience and trouble that this error may bring you, such as receiving irrelevant calls or messages. Emphasize the importance of correcting information in time.

4. Complaint: If the company does not actively respond or solve the problem, you can consider making a formal complaint to their customer service department or management. Explain the situation in detail in the complaint and ask them to take measures to solve the problem.

5. Seek help from a third party: If communication with the company fails, you can consider consulting relevant regulatory agencies, consumer associations or other relevant institutions for their advice and help.

6. Protect personal information: In order to prevent similar situations, you can strengthen the protection of personal information. Be careful not to disclose personal information at will, and regularly check and update the information records related to you in various institutions.

7. Legal channels: If the problem is serious and involves legal responsibilities, you can consider consulting a lawyer to find out whether there are applicable legal channels to safeguard your rights and interests.

8. Contact the tax bureau that texted you, tell them the actual situation, and ask them to stop texting. If not, please blacklist the information sources in your mobile phone and you won't receive similar messages in the future.

When dealing with such problems, it is important to be polite and patient, and at the same time to ensure accurate information and clear communication. Most companies will be willing to cooperate to solve problems and correct the wrong contact information.