DSV taking advantage of their clients

I feel like DSV just likes taking advantage of their clients. DSV has my parcel and was supposed to have delivered it on Friday the 11th November 2022, I knew unforseen problems may arise from nowhere so I gave them my phone number and an alternative number so they could reach me on and guess what they only called one which was off due to loadshedding. Okay fine, I thought I would receive a sms from them to reschedule the delivery and I never received anything until I had to call them myself on Monday morning and they later called me back around noon to reschedule for Monday the 21st and I honestly don't understand why because I provided them both my numbers and they decided to just use one and I know on Monday they'll come up with stories saying something happened to my parcel because this always happens with the DSV courier service