Just started couponing after moving here, not even sure if I got good deals 😅

I just moved to the US from Canada since me and my fiance are getting married at the end of the month and since money is a bit tight, I decided to try to coupon.

I did buy 1 get 1 40% off for head abd shoulders shampoo at CVS, plus another coupon from coupon24 that brought it down another $3 so I paid $10 for 2 12.5oz shampoo bottles + $4 back in ECB so $6 for 2 12.5oz bottles.

Then I moved on to trying to get the spend $30 get $10 in ECB back and got the gain 4.25L for $9.99 (the store I got it from mislabeled it, it was suppose to be $20) got 32oz dawn for $5.99 and a bounty 6 double rolls for $21 (i actually didnt notice this before, I grabbed the wrong one, I needed to grab the select a size one and I got the full sheet ones, oops, the price I originallywas suppose to pay though was $15.99 oops but still brought me to the min $35 to get $10 back in ECB) but the total for that was $41.19 and I used the $4 ECB I got from head and shoulders and got the price down to $36.19 but I didnt get the $10 ECB and I grabbed the wrong paper towels but it was still bounty so it should still count, ugh.

I know I should have checked the price before leaving but I kinda got excited and also wanted to go home asap to get dinner started, I wanna see if I can call customer service to get the $10 ECB still and maybe the $4 ECB from having thr wrong price, I did ask about it in store but they say they couldnt go any lower than the $10 for the detergent

This is my first time actually buying detergents and stuff since I've lived with my parents before this and only really bought actual grocery stuff so I know about the ideal prices of those (atleast back in Canada, here not so much) and for everything else I kinda dont really know, I look up the item and hope for the best basically