First, collect relevant evidence, including communication records, contracts, payment vouchers, etc. Then, contact the local consumer protection agency or the administrative department for industry and commerce, complain to them about this matter, and provide the evidence you collected. They will investigate this and take corresponding actions to protect your rights and interests. In addition, you can also consider seeking legal aid and consulting a lawyer about your rights and feasible legal channels. Lawyers can provide professional advice according to your specific situation and help you take appropriate legal action.