"Samsung S9 for $1 Only" Scam Being Sent by Scammers

Whilst on O2 rewards application, I was asked by promosurvey1.info to take part in a survey as I was a loyal O2 customer.
When the survey was completed I was informed that I now had an opportunity to win a prize, on the second attempt I was successful and had won a Samsung S7 mobile phone.
I was requested to pay

I'm from Victoria Australia :
I have almost been conned by these scammers. I started to fill in the form S and then when they ask for personal info or money. I quickly delete my info and hopefully, I won't be conned/scammed by them. Please don't send or give anybody your personal info.
Yours almost conned

100JYN has been taken by then and I cancelled it as soon as I recived their email. They said there are will be no more change. But I'm worry should I stop my card?

I have unintentionally fallen for a pop-up ad on my phone offering me a new Samsung s10 phone for just $1.
Subsequently I received emails from 2 separate 'organisations' providing login and password for their websites. Smelling a rat, I searched the sites and they have nothing to do with Samsung or any related supplier. The sites are as follows:
1) Brainratingstore.com
2) Optimuscl
Both sites had servers located in Amsterdam. Interestingly, both sites had footnotes written in Cyrillic, suggesting a Russian or Ukrainian based scam. Why am I not surprised?
I opted out of both and received notification emails confirming my 'Opt out'. I hope it works because they both stated that if I did not opt out within 3 days, I would be perpetually charged $99 per month until I did opt out. I note that they have both charged my credit card with $1 and $3:30 respectively. I really hope that's the end of the matter but be others to be warned...

Although it is a different site, I was asked for money with the same feeling now. Canceled immediately, is this really the end?

Hi, there was a link on my facebook feed, advertising the Samsung S9 for $1.
I completed the form asking for my bank details, and then it said that the offer was declined.
However, R642.31 was deducted from my bank account.
I have reported it to my bank, and they are now investigating. But does anybody know of another way I could get my money back?

I was asked to fill out a Firefox survey and sent to a site with the same type of promotion. A Samsung Galaxy S10- contest entry and purchase offer for just $2.
I also did a search and found this site.
The scam url is here- personalgift.co

I have just got scammed. Money was deducted from my account and nothing further happend

You must cancel your account or they will continue to withdraw money.

This happened to me because my daughter presses something they took money off my account

My daughter entered my visa information thinking it was for real. Luckily it was a card that had too little money in it so it was "declined", can they use the information again to deduct money? should I change my account number?