Why are we a borderline case for Tesco deliveries?

The vans pass at the end of the road and this has been going on for five yearsI’m at my wit’s end trying to persuade Tesco to deliver groceries to my house – the vans pass the end of my road but will not stop. This has gone on for over five years (as you’ll see from the correspondence I have forwarded to you). The company keeps saying my postcode is not covered by deliveries from its Perth store – I am apparently on the “wrong” side of the border –