Gardening booking service via a website. Created on Webflow

We are a gardening company now looking to make a website where clients can pay for a monthly subscription based gardening service via the website. With the following packages: Monthly payment costs 650 SEK per month. If you buy 6 months upfront it will cost 625 SEK/month. If you buy 12 months upfront it will cost 575 SEK/month.
We have already designed the website on WebFlow. We now need help with setting up the payment system for the different package. (Some of it has already been set up).
We also want help with fixing the website so it looks good on the phone.