Since your current medication (tramadol and paracetamol) and physiotherapy haven't provided relief, your left-hand pain may be nerve-related (neuropathic) or due to cervical nerve compression. You should consult your doctor about trying nerve-specific pain medications, such as gabapentin or pregabalin, which target nerve pain more effectively. Alternatively, stronger prescription pain relievers or a short course of nonsteroidal anti-inflammatory drugs (NSAIDs) might be considered under medical supervision. I highly recommend consulting your physician or a pain specialist to get a cervical spine X-ray or MRI to identify the exact cause of the pain and safely adjust your treatment plan.