Hello again,
From what I have read in this site only give support in Spanish. However, I found other site, here two links: https://gethuman.com/help/Movistar
https://gethuman.com/email/Movistar/report-new there yes gives support in English, but I not sure of security from website. An advice, in your first message you don't give his Personal Data in case they won't answer at least they wouldn't have your Data. Being a service where somebody can to search for services and companies dedicated to telephony, maybe they could only collect information from you. That's all we've found in English.
Sincerely.