Flight change on Covid-19 held flights

I have been trying for more than 2 weeks to try and rebook BA flights that was placed on hold due Covid19 It ends in a hold of 20+ minutes and then having the call dropped or being told that they only have 2 people doing the booking changes and that they are 2 weeks behind but will get to the tickets. Then this morning I am told the 1 lady only comes in at 9:30 and then I will get a call back as per the supervisor instruction. Worst service ever received by Kulula and BA