Is Opticom a scam, ransonware, or scareware?

Most definitely a phishing scam.

I presume this message manifests as a pop-up or full-screen browser window. If so, simple close the browser window/tab; do not reply or interact with the message. If the message arrived by email, just delete the email; do not click any embedded links.

Now, let’s concentrate on what you can do to either prevent or reduce likelihood of recurrence…

Firstly, this is support page is recommended reading:

Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

Browser-based attacks can largely be mitigated by installing a good Content and Ad-blocking product. One of the very best and most respected within the Apple App Store - designed for iPad, iPhone and Mac - is 1Blocker for Safari.

https://apps.apple.com/gb/app/1blocker-for-safari/id1365531024

1Blocker is highly configurable - and crucially does not rely upon an external proxy-service of dubious provenance. All processing takes place on your device - and contrary to expectations, Safari will run faster and more efficiently. 

Unwanted content is not simply filtered after download (a technique used by basic/inferior products), but instead undesirable embedded content blocked form download. A further benefit on metered services, such as cellular connections where you data may be capped or chargeable, this not only improves speed but also saves you money.

A further measure to improve protection is to use a security-focussed Recursive DNS Service in preference to automatic DNS settings. This can either be set on a per-device basis in Settings, or can be set-up on your home Router. I strongly recommend using one of the following services - for which IPv4 and IPv6 server addresses are listed:

Quad9 (recommended)

9.9.9.9

149.112.112.112

2620:fe::fe

2620:fe::9

OpenDNS

208.67.222.222

208.67.220.220

2620:0:ccc::2

2620:0:ccd::2

Cloudflare+APNIC

1.1.1.1

1.0.0.1

2606:4700:4700::1111

2606:4700:4700::1001

Use of the above DNS services will help to shield you from “known bad” websites and URLs - and when used alongside 1Blocker, or other Content Blocker provides defense in depth.

There are advanced techniques to further “harden” iOS/iPadOS, but these are perhaps beyond the immediate skills of novice users.

I hope this information and insight proves to be helpful. 

Never heard about Opticom.

See this support page:--> Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

Regards

Giulio