Lidl complaint: Non registering of till receipt on my Lidl Plus Card

My complaint:

I completed my shop at Lidl Bexleyheath
(till receipt details. 1428 087572 25.03.21 11.04 Value £67.75

I scanned my Lidl Plus App on my phone at the checkout till. On arrival at home I checked the App and found that the receipt was not registered or included in my record of receipts. This has resulted in not achieving the target enabling me to get a money off coupon from my next purchase.

Suggested solution:

I'd like Lidl to credit my account with the sum of £67.75 going towards my achieving and reaching a pre-set target in order to obtain a money off coupon against further purchases.