When you decide to end a service contract early, you can send the request yourself or let the seller, a dealer finance office, or a third-party cancellation service send it for you. Both routes can work. The difference is who holds the proof that you asked, when you asked, and what they answered.
Why the proof matters more than the phone call
A cancellation is a request, and the contract usually says exactly how that request has to arrive. Some contracts want a written notice sent to a named address. Some accept a form on a website. Some allow a phone call but still require written confirmation afterward. If the request arrives the wrong way, the clock on any refund may never start, and you may have no easy way to show you tried. Read the cancellation clause before you sign, not after you want out.
Doing it yourself
When you send the notice yourself, you control the wording and the record. Keep a copy of exactly what you sent. Use a method that gives you a delivery record, such as trackable mail or an online form that produces a receipt. Write down the day you sent it and the name of anyone you spoke with. Ask for written confirmation that the cancellation was received and how the refund will be paid. Keep every reply in the same folder as your original contract.
Letting someone else do it
A dealer, a finance office, or a cancellation service may offer to handle the paperwork. That can save effort, but it adds a middleman between you and the refund. Before you hand over the request, ask who will send it, to what address, and whether you will receive a copy. Ask whether any fee for their help comes out of your refund, and get that answer in writing. If the seller is also the party holding your payment, ask how long they keep it and who is responsible if it goes missing.
Questions to ask before you sign
Ask the seller these things, in writing if you can. Where do I send a cancellation? Can I cancel by phone alone? Who pays the refund, the seller or the provider? If the refund is calculated from a formula, which inputs does it use? Is there a point in the contract after which cancellation is no longer allowed? If an answer is only a verbal promise, ask for that answer to appear in the contract itself.
What to compare
This site publishes the money-back period for each company it reviews in its money-back period table, and it lists the providers that post a sample contract you can read at home. Use those tables to compare cancellation language before you are in a showroom with a pen in your hand. The copy you are actually offered is the one that binds, so compare it line by line against the sample.
When to get outside help
If the seller refuses a written answer, or a refund never arrives, keep every record you have and contact your state's consumer protection office or a licensed attorney where you live. Those are the people who can tell you what applies in your location. This page is a plain explainer of how these contracts usually work, not legal advice.