Hello,
I can convert this for you. I do this type of job quite often and have a number of processes that I use for this type of task.
The software I use allows me to specify the grid for the spreadsheet being converted. Due to that, I can specify exactly where cells are broken up.
Without having seen the data, it is hard to otherwise comment, but if you want to send a sample of the file I will run some tests.
Thanks
Joe Rowan