I keep having a lot of moments where people are initially interested, but then I get back to them and they're not answering their phone or replying to my emails. I have sent people looms etc, a lot of them are saying 'get back to me in x time' How do you guys follow up?

So as some of you guys may know, I'm the only sales person in my company. I have yet to cold call since we are a small company and we don't have a data provider / I think we will have to follow some restrictions etc but I am open to doing so. I have messaged / emailed over 2x every single business finance company in the UK (around 800-1000). We sell software to help with their processes and we currently only market to business finance. Sales cycle can be anywhere from 1 day to 3 months. I am booking calls and making conversations but not seen much success in a few months. Do I need to be sending more outreach? PS: We are currently trying to market to the USA aswell and getting constant cold email campaigns Any tips help 🙏

Do you recommend dialing after someone is interested about your email?

I've started messaging Software/IT Managers on LinkedIn when there is no contact number and would welcome any advice on my approach. "Hi (Name), I've seen that (company name) are currently recruiting for a number of IT related roles, I'm sure that you already have a PSL or that you have these roles covered and wouldn't actually benefit from additional help. However, if that's not the case, I would love to set up a call and run through how I can help you fill these positions with the best candidates. Speak soon. Sash"

I don't currently use a CRM as I'm the only person within sales, I literally just use a google sheet with coloured rows for stage of the prospect. I've been seeing clay is supposed to be a good tool. Any advice? Is it stupid to not have a CRM?