As per the agreed contract, you were obligated to complete the payment for the website development services provided. You have paid an advance but have refused to pay the remaining amount after the delivery of the website. Please be informed that legal action may be taken against you under the following acts:

1. Indian Contract Act, 1872: Breach of contract may result in compensation claims under Section 73.
2. Specific Relief Act, 1963: Specific performance may be sought to enforce the contract.
3. Negotiable Instruments Act, 1881 (Section 138): If a cheque was issued and bounced, legal action may be taken.
4. Indian Penal Code (IPC): Cheating (Section 420) and Criminal Breach of Trust (Section 406) may apply if fraudulent intent is proven.
5. Consumer Protection Act, 2019: Legal action may be taken for unfair trade practices or deficiency in service.

Please consider this as a formal notice. Immediate payment of the remaining amount is expected to avoid legal proceedings.