First and last time choosing DHL

Hello. I am so disappointed after choosing DHL for a small online purchase for my son's motorcycle. The purchase was done through a mobile phone app for one amount that went off my bank account. The site I purchased from sources items from different suppliers, hence the two waybill numbers ******0742 and ******8350. This purchase was done 07 January 2019. I specifically chose to pay extra for DHL shipping to get the items here promptly. I constantly have to call the customer service department for updates. I have received letters stating I under declared the values so will be fined. I have submitted required documents IMMEDIATELY when asked to do so. I was even told that the jewelry set was under declared that I ordered. There is no jewelry set for a motorcycle! It is clear to me that if you look at the two waybill numbers values, they will tie up to the amount that went out of my bank account, showing that nothing was under declared. Why has it taken a MONTH to sort this out? My son is now going overseas 1 March and is extremely disappointed as well. It feels like DHL is just too big to care.