Faulty items not collected for exchange over 2weeks now

Seems september was not my month with online purchases.I ordered a pair of slippers on 13.09.2022 and some other stuff it was delivered on the 19.09.2022 upon opening the box i noticed the slippers where 2right foots do i immediately logged a call for exchange sent all the relevant pictures that was required ,got a response to say collection will be done the next day.. I have been waiting since that day with slippers i paid for but am not able to wear them ,i have been doing follow up only to get new references and messages to say my collection has been rescheduled,till today matter has not been resolved so i want to know if this is the treatement we get for trusting online purchases,not a single day did anyone from superbalist has called me to follow up all i get is emails to apologise and delay me further...i have run out of patiebce with them am 37weeks pregnant i should be not be stressing about a pair of slippers but rather my unborn baby....Am so dissapointed in the manner that they treat me right now.....