sudo apt install unzip build-essential patchutils libproc-processtable-perl git
sudo apt update
sudo apt upgrade
sudo reboot
sudo apt-mark hold linux-generic linux-headers-generic linux-image-generic
git clone https://github.com/tbsdtv/media_build.git
git clone --depth=1 https://github.com/tbsdtv/linux_media.git -b latest ./media
cd media_build
make dir DIR=../media
make allyesconfig
make -j4
wget http://www.tbsdtv.com/download/document/linux/tbs-tuner-firmwares_v1.0.tar.bz2
sudo tar jxvf tbs-tuner-firmwares_v1.0.tar.bz2 -C /lib/firmware/
sudo rm -rf /lib/modules/`uname -r`/kernel/drivers/media/*
sudo make install
sudo reboot

Check /dev/dvb, you should see one adapter folder for every tuner your card has.

To update the drivers, remove the media_build and media folders and start again, it's much quicker.