Data Recovery M1 SSD

I have an Apple M1 macbook Air 2020, 1 TB SSD. 

Initially my SSD had two partitions, 

MAC OS - 300 GB

Data - 700 GB

Due to some trackpad issues, I formatted MACos and was re-installing OS in MAC OS partition. 

While this was happening, it faced some issue and asked me to Erase all data and install the OS and accidentally I clicked on 'Erase All' and now after it got installed, I have a single drive of 1 TB with no data at all. 

Please please please help me in this

Arghya Saha