Was I mis-sold a SIM?

[starfish]

Having had a problem with my phone locking after some sort of update and finding that the replacement SIM didn't work because the phone was now permanently blocked, I bought a new phone in person from the O2 shop.  Something came up about a sim card and I said I didn't need a PAYG as I was on the monthly £3 plan.  This was yesterday.  Today I was checking the receipt and the list is

1. Pre S/Sung J4+ Black £109.00 (does the pre bit mean it's pre owned?) followed by the imei and new number that matches the unopened SIM.  I have kept my original number.
2. Pre Internation Triple SIM £5.00, followed by SIM Auto Discount 100%  -£5.00, Sub Total 0.00
3. O2 Pay As You Go £10, £10.00
4. Bundle S/Sung C/It J4+ Black £14.99 (this is the Case it cover)

I did take a photo but couldn't insert it.

[MI5 · Accepted solution]

It's just a free PAYG SIM which you don't need to use as you already have your own..
All phones come with a new SIM automatically.

[starfish]

Hi.  It wasn't free though, it was more than I needed and cost £10.  The phone was £109, the Case-it was £14.99 = £123.99.  The total came to £133.99 because they included a £10 SIM.

Anyway, I rang customer services and they refunded the £10.00.

[MI5]

That was the top up not the sim. All PAYG phones have to be topped up at point of sale but it’s at the managers discretion. They should made an exception really.