What kind of a hiring process is this? Need advice [Repost with better formatting]

I recently interviewed at a large company. I applied by sending my resume to someone in my network who works there and they forwarded the resume to HR. After that I got a call from HR and they asked for my expected salary among other things to which I answered that I want a 40% hike. I cleared all technical interviews and after that I got a mail saying that they would like to offer me a full time role and asked some of my documents to prepare an offer.

I was curious about them asking for documents without having an HR round first so I called the HR and asked some details about the job and she ensured that they can give me a 40% hike on base but not on TC so I assumed they will hike my base and keep the other components in a similar range to what I currently have.

I send the documents and on the next day I get a call from HR asking about my expected compensation again, I then ask about their salary structure and they explain that it's all fixed. I was confused on what number to give them so I said that I wanted a 40% hike but since my TC consists of variable components and theirs don't, I would like to know what is the maximum salary they could give me to which the HR replied that they will let me know in a while.

It's been more than 24 hours and I haven't heard back. I don't want to call the HR because that might make me look desperate and give them a reason to lowball me but I'm not sure what to do and am even more confused about the kind of process being followed at this company.