What can i do to get my order sent to me and be correct

I recently purchased an XPS 13 (9350) (Nov 18th)along with the promotion tablet that was offered of Dell's Venue 8. The order was placed on the evening of the 18th of Nov and I received my shipment that following Monday the 23rd.

Here is where the confusion seems to be coming into play and I'm really not sure why they are having a hard time understanding. My order consisted of 4 individual items.
(1-)XPS Laptop 13 Touchscreen Model 9350,
(2-)Promotional Dell Venue 8 tablet.
(3-)Lo Jack for laptop,
(4-)Microsoft 365 office (as a digital download so not delivered by mail).

Upon receiving the order which came in three different boxes for the first 3 listed above. I opened the two small packages and there was a Venue 8 tablet in each one and then the big box has a card for the Lo Jack software (which could have came in an envelope as opposed to a box 1000 times larger than needed).

I call customer support immediately that Monday only to sit on hold for two hours and nothing was resolved and I spoke to a supervisor who was going to call me back due to a bad connection and never did. By that time I had to get back to work so I couldn't spend another 2 hours sitting on holding waiting for someone to pick up.

The next day I still didn't hear anything back so I started a chat online instead since that was the lower of the waits at around 1-2 hours. I sat on hold on the phone which never was picked up. The chat was in the sales area who wanted me to cancel the first order and repurchase the order again. This would save me waiting 7-10 business days after the tablet would be exchanged for the correct item.

Spoke with the supervisor in this department who seemed to know how to fix the problem but never bothered to get back to me either on the issue. Why doesn't Dell's customer service have any follow through on what they tell customers they are going to do?

Finally today I called when I was able to get a spare minute. First round of calling I spoke with a rep that after an hour and a half of waiting decided to transfer me to another department only to disconnect the call in the process. So I called back and once again sat on hold for about 2 hours this time and then a representative answered the call and told me they are closed and to call back tomorrow and then proceeded to disconnect the call.

What seems to be the issue or hold up here? I just want to get the laptop I purchased and give back the extra tablet that was sent in error. I don't think it needs to be this time consuming or frustrating to solve a error that was done by Dell. Not only am I having to keep dealing with this issue I'm going to have to wait even longer to actually get my laptop.

Finally today my replacement laptop was suppose to come in the mail but only to find out that the service department had cancelled the order a few days prior due to not getting managerial approval. So Once again I called and stayed on hold for about 4 hours to reach someone, Explained the issue and now they are processing another order that will take an additional 7-10 days before I get it. I'm at a lose right now of what I should do, it's pathetic that its going to take over a month to get a laptop that was originally suppose to arrive on 11/23