Apple TV Subscription Refund

1. Possibly there was small print about conditions for this offer (e.g. for new subscribers only). Then non-qualifying users would be charged the nominal fee.
2. Most often, offers require that these are redeemed in a special way, either on the qualifying device, or on the offer website or app. Doing it on a different device or in a different way, wouldn’t apply the offer.
3. If the offer is made through a third party company (e.g. Samsung), then their terms and conditions apply for getting the offer.
4. Recent purchases can qualify for refunds. Apple will ask you why/​what happened. Do include that, as it will be a consideration for the staff’s decision. Request a refund for apps or content that you bought from Apple - Apple Support

Apparently you saw on offer on your TV that would be subject to the eligibility of whatever terms that the manufacturer included in that offer. In most cases you will see that the free service is only available to new subscribers, so if you had ever used a free trial before, then you would not qualify and would be charged for the service. If you feel that you were misled by the offer that your TV Manufacturer provided to you, then contact them for further assistance. Apple has 3 month free offers, but that only applies to their products purchased from them with those details here:

https://www.apple.com/promo/pdf/EN_US_ATV+_Promo_TandCs.pdf

To cancel an Apple TV+ subscription:

How to cancel Apple TV+ - Apple Support

To request a refund:

Request a refund for apps or content that you bought from Apple - Apple Support