How to edit wording on checkout page

-- url of the page with the problem -- : bobandangie.co.uk/index.php/hika-shop
-- HikaShop version -- : Starter 4.4.2
-- Joomla version -- : 3.9.26
-- PHP version -- : 7.4.18
-- Browser(s) name and version -- : Microsoft edge

Hi, I have a simple shop in testing phase using Paypal express, no registration required, collection only and it seems to be working using the paypal button. My problem is that there is wording on the checkout which is not required and I would like to remove it, is that possible in any of the setups or do I have to go into PHP somehow?
This is what comes up: -
Registration not allowed
No payment methods found
Enter your coupon

Hi Nicolas, thanks for the information.
I don't have a login view or coupon so don't know why the wording appears in the checkout box. I would love to be able to edit the wording if I could find out where it was.
Can you help me further please by letting me know exactly how to find the checkout box to edit it.

Hi Nicolas,
Thank you so much for trying to sort this out for me. My workflow doesn't display in boxes for some reason but I have taken screenshots of the checkout workflow as displayed on my screen. You will see that Coupon is set to "no option"

Hi Nicolas,
Thanks again for your help, I corrected that problem and have deleted the coupon and login boxes, those two messages no longer appear. Sadly I still get the "no payment methods found" message so I still have something wrong.

Hi, I found that I just need to delete the payment box as well so only the cart is left, now everything is fine.

Ah, I see now. I am gradually getting to understand a bit better, takes a while at my age! Sorry but I still need to ask where I can find the CSS style sheet for the checkout box and what it is called please?

Hi, I can see the finish button on the HTML side but can't work out exactly where to put your code into the CSS, could you give a bit more detail for this case please?

HTML
<div class="buttons_right">
<button id="hikabtn_checkout_next" type="submit" class="hikabtn hikabtn-success hikabtn_checkout_next" onclick="return window.checkout.submitStep(this);">Finish</button>
</div>

CSS
element.style {
}
body.site {
border-top: 3px solid #0088cc;
background-color: #f4f6f7;
}
body.site {
border-top: 3px solid #0088cc;
padding: 20px;
background-color: #f4f6f7;
}
body {
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}
@media (max-width: 979px)
body {
padding-top: 0;
}
body {
margin: 0;
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
font-size: 13px;
line-height: 18px;
color: #333;
background-color: #fff;
}
user agent stylesheet
body {
display: block;
margin: 8px;
}
html {
font-size: 100%;
-webkit-text-size-adjust: 100%;
-ms-text-size-adjust: 100%;

Hi Nicolas,

Thank you for that. I hadn't read the tutorial well enough and was clicking on the wrong bits, sorry about that. Having found the right display button to click it made sense. I'm glad you told me to put it at the end, that worked, thank you.