Why has Royal Mail only delivered letters twice in three months?

Summary

I am waiting for the overdue results of a cancer test, and the postal service seems to be prioritising parcels over letters In the three months since I moved to my village, I’ve had just two deliveries of letters. One of them was only because I caught a passing postman on a parcel round who arranged one just for me. The bundle contained a bank card, two notifications of an overdue bill I was unaware of, a weeks-old letter from my new water company asking me to set up payments, and a letter about a routine cancer test. There has been nothing since.

Description from The Guardian.