MH/HF DSC radio tests with coast stations

My weekly test transmissions usually fall on deaf ears. Rarely a response. Currently assing through the Strait of Gibraltar for a few months in the Med. Any suggestions?

How far was the coast station. Did you test during day or night?

Also, what frequency did you try?

Rome usually responds
We would just email a vessel in our fleet and say turn it on and we will call you
HF will be gone from vessels soon