Hello there,
I have read your description and understood that you have an existing website which is made of prestashop and you are not able to operate it and also you want to install the shipping plugin with correos express and also want to check that the payment method by strip or need more modifications. I can help you to make such changes in your website.
I would like to ask
what kind of website you have?
I have an experience of about 6+ years in web development and my expertise are php , CMS , html, wordpress etc. I am very much interested to work in this project and want to start it immediately. kindly ping me for further discussion .
Hope ti hear back from you soon.
Regards
Harshita