Tldr :
Office Building : 1
Population: 5000
Number of PC users: 5000
No of Spare mice: 0

Day 1:
Training period commences.
My mouse laser sensor doesn't work.

Solution: Use this mouse to log in to your system.
Open the company portal.
Connect to vpn.
Enter username password.
Create a ticket for mouse replacement.
Done.

Day 3
I bring my own mouse.
Confiscated at security.
Becomes a security violation.

Day 9
I get a call from helpdesk.
Agent- what is the problem?
Me- my mouse is not working.
Agent- why?
Me- what do you mean? Something is wrong with the sensor.
Agent- clean the sensor.
Disconnects call.
Marks ticket as resolved.
Me- WTF just happened!

Naturally, I escalate the issue.

Day 15
Level 2 Agent- what happened? Why have you escalated the issue?
Me- I need a mouse, waiting since 2 weeks.
Him- No mouse is available
Me- you don't have a single spare mouse available in an office with 5000 PC users?
Him- no they're out of stock.
Me- when will it be back in stock?
Him- we will 'soon' launch a tender for quotations from sellers.
Me- time?
Him- 1 week.

Day 34

I email the head of supplies for the city office. Next day I get a used super small mouse, which doesn't have a left button. Anyways, I've given up hope now.

Day 45
I become a master at keyboard shortcuts.
Finish my training.
Get transferred to another city.
No mouse till date.

Surprisingly, this was one of the top recruiters in my country. Never knew, MNCs can be so so inefficient for such simple tasks.
Start-ups are way better in this regard. Latest tech, small community, minimal bureaucracy and a lot of respect and things to learn.