Medical practice says NO

Terrible service. I am a health care practitioner who has used Lancet for years. My current practice has been a client of theirs for more than 10 years. Their service quality has decreased rapidly and significantly over the past few years. They have LOST several of our client's samples over the past month alone, and always have the audacity to blame us for "not submitting the sample," despite me handing the samples to the courier with my own two hands and the courier signing for said samples. They do not respond to emails. I have to spam them with endless phone calls, and emails to several people, AND wait a minimum of a month for someone to assist me with queries. It is very clear that they have more than enough business, and don't need their long-standing clients anymore.