Fair priced security/firewall assistance needed

I have a small ISP with a very slim budget. We setup with a company a while back who provided firewall rules for us but I have a strong feeling that they’re insufficient and that they’re also inefficient. I’ve managed to save a couple hundred bucks which is all I can really spare given the barely profitable status at the moment. Does anyone know of someone that can help me improve on what we have that won’t cost me a small fortune?

“strong feeling” is a not so objective parameter.
If you cannot disclose too much info here then I guess you’ll have to find some Mikrotik consultant on this.

There are … quite a lot …

https://mikrotik.com/consultants

Default rules “concept” can protect any ISP

Are you talking rule for your edge routers, or are you talking about client devices??
Some context would help network diagrams??