Not given the tools he needs to perform his duties
I am working in the tourism industry with a company, I head the security department while my title is chief security officer (CSO)
The company has tasked me with duties you would expect in the role of a security officer.
My company has not provided me with essential working tools, such as Laptop or computer, mobile phone, means of communication, internet (Wi fi), security portable light or mega light. In lieu am using my own laptop, mobile phone, airtime, modem and its airtime too, and my own security mega light.
I have discussed all of the above with my immediate management, all in vain, and I feel keeping on discussing this may create bad blood between me and them.
Kindly help me understand what I should do and how I should survive as well as perform.

Although I don’t see how you can oversee security effectively without having access to their wifi …. . ….. Are you not securing their IT?
Have you worked out what this is costing you? I guess the only incremental cost might be the airtime and the internet access, and batteries. And of course, wear and tear on items.
Maybe there is a deal to be done to compensate you for the use of your equipment and to pay any additional costs you are incurring
This might leave you better off than if you had company equipment. Technological equipment changes so fast now that there is little point having two of anything, they need to be updated before they wear out.
This is likely to become a growing trend in business as people become used to being able to work from anywhere, and working more flexible hours.
Do you really want two sets of equipment to carry about and keep charged up?
And businesses find that people need less IT support if they own and manage the equipment. Staff contact the manufacturer directly if there is an issue. Problems can be resolved quickly without involving other departments.
I suggest you go back to management with a new proposal, having worked out what you think is reasonable compensation, and produce evidence of your costs.
Also consider and discuss with management what happens if your equipment fails? Who will replace it?
There may be light at the end of the tunnel!